TAICHI OKUDA

Last Updated :2026/06/03

Affiliations, Positions
Research Institute for Synchrotron Radiation Science, Professor
E-mail
okudathiroshima-u.ac.jp
Other Contact Details
2-313, Kagamiyama, Higashi-Hiroshima, Japan
TEL : (+81)82-424-6996 FAX : (+81)82-424-6294
Self-introduction
I am studying surface electronic states of materials experimentally using photoelectron spectroscopy (especially, spin-resolved photoelectron spectroscopy) at the synchrotron radiation beamline. In addition, I am interested in to developing new experimental techniques and instruments for the surface science research.

Basic Information

Major Professional Backgrounds

  • 1997/04/01, 1999/08/31, RIKEN, Special Postdoctoral Researcher
  • 1999/09/01, 2007/03/31, The University of Tokyo, Research Associate
  • 2005/02/28, 2006/02/28, Physics Institute, Zurich University, Visiting Researcher
  • 2007/04/01, 2009/03/31, The University of Tokyo, Assistant Professor
  • 2009/04/01, 2017/03/31, Hiroshima University, Hiroshima Synchrotron Radiation Center, Associate Professor

Academic Degrees

  • Ph.D. (Science), Osaka University
  • Master of Engineering, Osaka University

Educational Activity

  • [Bachelor Degree Program] School of Science : Physics : Physics
  • [Master's Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Physics Program
  • [Doctoral Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Physics Program

In Charge of Primary Major Programs

  • Physics

Research Fields

  • Interdisciplinary science and engineering;Applied physics;Thin film / Surface and interfacial physical properties
  • Mathematical and physical sciences;Physics;Condensed matter physics II
  • Mathematical and physical sciences;Physics;Condensed matter physics I

Research Keywords

  • Surface and Interface Science, Synchrotron Radiation, Photoelectron spectroscopy, Spin-resolved photoelectron spectroscopy, topological materials

Affiliated Academic Societies

  • Japan Society of Applied Physics, 1997, 2010

Educational Activity

Course in Charge

  1. 2026, Liberal Arts Education Program1, 2Term, Introductory Seminar for First-Year Students
  2. 2026, Undergraduate Education, First Semester, Special Study for Graduation A
  3. 2026, Undergraduate Education, Second Semester, Special Study for Graduation B
  4. 2026, Undergraduate Education, 3Term, Special Lectures in Physics(Fundamentals and Applications of Chiral Physics)
  5. 2026, Graduate Education (Master's Program) , 2Term, Surface Physics
  6. 2026, Graduate Education (Master's Program) , 3Term, Special Lecture in Physics D
  7. 2026, Graduate Education (Master's Program) , First Semester, Exercise in Physics I
  8. 2026, Graduate Education (Master's Program) , Second Semester, Exercise in Physics II
  9. 2026, Graduate Education (Master's Program) , First Semester, Special Exsecise in Physics A
  10. 2026, Graduate Education (Master's Program) , Second Semester, Special Exsecise in Physics B
  11. 2026, Graduate Education (Master's Program) , Year, Special Research in Physics
  12. 2026, Graduate Education (Doctoral Program) , Year, Special Research in Physics

Research Activities

Academic Papers

  1. Spin polarization of surface states on W(1 1 0): Combined influence of spin-orbit interaction and hybridization, Journal of Electron Spectroscopy and Related Phenomena, 201, 53-59, 20150501
  2. Spin polarization of surface states on W(1 1 0): Combined influence of spin-orbit interaction and hybridization, Journal of Electron Spectroscopy and Related Phenomena, 201, 53-59, 20150501
  3. Spin polarization of surface states on W(1 1 0): Combined influence of spin-orbit interaction and hybridization, Journal of Electron Spectroscopy and Related Phenomena, 201, 53-59, 20150501
  4. Tunable spin current due to bulk insulating property in the topological insulator Tl1-xBi1?δ, Physical Review B - Condensed Matter and Materials Physics, 91(20), 20150518
  5. Tunable spin current due to bulk insulating property in the topological insulator Tl1-xBi1?δ, Physical Review B - Condensed Matter and Materials Physics, 91(20), 20150518
  6. Tunable spin current due to bulk insulating property in the topological insulator Tl1-xBi1?δ, Physical Review B - Condensed Matter and Materials Physics, 91(20), 20150518
  7. The gigantic Rashba effect of surface states energetically buried in the topological insulator Bi2Te2Se, New Journal of Physics, 16, 20140101
  8. The gigantic Rashba effect of surface states energetically buried in the topological insulator Bi2Te2Se, New Journal of Physics, 16, 20140101
  9. The gigantic Rashba effect of surface states energetically buried in the topological insulator Bi2Te2Se, New Journal of Physics, 16, 20140101
  10. Valley-dependent spin polarization in bulk MoS 2 with broken inversion symmetry, Nature Nanotechnology, 9(8), 611-617, 20140101
  11. Valley-dependent spin polarization in bulk MoS 2 with broken inversion symmetry, Nature Nanotechnology, 9(8), 611-617, 20140101
  12. Valley-dependent spin polarization in bulk MoS 2 with broken inversion symmetry, Nature Nanotechnology, 9(8), 611-617, 20140101
  13. Direct observation of the spin polarization in Au atomic wires on Si(553), New Journal of Physics, 16, 20140923
  14. Direct observation of the spin polarization in Au atomic wires on Si(553), New Journal of Physics, 16, 20140923
  15. Direct observation of the spin polarization in Au atomic wires on Si(553), New Journal of Physics, 16, 20140923
  16. Quasi-periodic variably polarizing undulator at HiSOR, Journal of Physics: Conference Series, 425(PART 3), 20130422
  17. Quasi-periodic variably polarizing undulator at HiSOR, Journal of Physics: Conference Series, 425(PART 3), 20130422
  18. Quasi-periodic variably polarizing undulator at HiSOR, Journal of Physics: Conference Series, 425(PART 3), 20130422
  19. Experimental verification of PbBi 2Te 4 as a 3D topological insulator, Physical Review Letters, 108(20), 20120515
  20. Experimental verification of PbBi 2Te 4 as a 3D topological insulator, Physical Review Letters, 108(20), 20120515
  21. Experimental verification of PbBi 2Te 4 as a 3D topological insulator, Physical Review Letters, 108(20), 20120515
  22. Quasiparticle interference on the surface of Bi 2Se 3 induced by cobalt adatom in the absence of ferromagnetic ordering, Physical Review B - Condensed Matter and Materials Physics, 85(20), 20120529
  23. Quasiparticle interference on the surface of Bi 2Se 3 induced by cobalt adatom in the absence of ferromagnetic ordering, Physical Review B - Condensed Matter and Materials Physics, 85(20), 20120529
  24. Quasiparticle interference on the surface of Bi 2Se 3 induced by cobalt adatom in the absence of ferromagnetic ordering, Physical Review B - Condensed Matter and Materials Physics, 85(20), 20120529
  25. Negative spin polarization at the Fermi level in Fe 4N epitaxial films by spin-resolved photoelectron spectroscopy, Journal of Applied Physics, 112(1), 20120701
  26. Negative spin polarization at the Fermi level in Fe 4N epitaxial films by spin-resolved photoelectron spectroscopy, Journal of Applied Physics, 112(1), 20120701
  27. Negative spin polarization at the Fermi level in Fe 4N epitaxial films by spin-resolved photoelectron spectroscopy, Journal of Applied Physics, 112(1), 20120701
  28. Topological surface states with persistent high spin polarization across the dirac point in Bi 2Te 2Se and Bi 2Se 2Te, Physical Review Letters, 109(16), 20121017
  29. Topological surface states with persistent high spin polarization across the dirac point in Bi 2Te 2Se and Bi 2Se 2Te, Physical Review Letters, 109(16), 20121017
  30. Topological surface states with persistent high spin polarization across the dirac point in Bi 2Te 2Se and Bi 2Se 2Te, Physical Review Letters, 109(16), 20121017
  31. Massless or heavy due to two-fold symmetry: Surface-state electrons at W(110), Physical Review B - Condensed Matter and Materials Physics, 86(16), 20121018
  32. Massless or heavy due to two-fold symmetry: Surface-state electrons at W(110), Physical Review B - Condensed Matter and Materials Physics, 86(16), 20121018
  33. Massless or heavy due to two-fold symmetry: Surface-state electrons at W(110), Physical Review B - Condensed Matter and Materials Physics, 86(16), 20121018
  34. Observation of a highly spin-polarized topological surface state in GeBi 2Te 4, Physical Review B - Condensed Matter and Materials Physics, 86(19), 20121106
  35. Observation of a highly spin-polarized topological surface state in GeBi 2Te 4, Physical Review B - Condensed Matter and Materials Physics, 86(19), 20121106
  36. Observation of a highly spin-polarized topological surface state in GeBi 2Te 4, Physical Review B - Condensed Matter and Materials Physics, 86(19), 20121106
  37. Emergent Dirac fermions in graphene and underlying Au monolayer with two-dimensional ferrimagnetism, NANOSCALE, 17(37), 21706-21716, 20250925
    Link to Paper Search Results by DOI
  38. The electronic structure of palladium on magnetoelectric Cr2O3(0001), JOURNAL OF PHYSICS-CONDENSED MATTER, 37(39), 20250929
    Link to Paper Search Results by DOI
  39. Hedgehog-like spin texture in Sb-doped MnBi2Te4, PHYSICAL REVIEW RESEARCH, 7(3), 20250724
    Link to Paper Search Results by DOI
  40. Electronic structure of (Mn1-xPbx)Bi2Te4: Experimental evidence of topological phase transition, PHYSICAL REVIEW RESEARCH, 7(2), 20250519
    Link to Paper Search Results by DOI
  41. Crystal-symmetry-paired spin-valley locking in a layered room-temperature metallic altermagnet candidate, NATURE PHYSICS, 21(5), 202505
    Link to Paper Search Results by DOI
  42. Spin texture tunability in Mn1-xGexBi2Te4 through varying Ge concentration, PHYSICAL REVIEW B, 111(11), 20250326
    Link to Paper Search Results by DOI
  43. Spin splitting in the surface electronic structure of antiferromagnet NdBi, PHYSICAL REVIEW RESEARCH, 7(2), 20250403
    Link to Paper Search Results by DOI
  44. Surface-specific thermal spin-depolarization on the half-metallic Heusler films, COMMUNICATIONS PHYSICS, 8(1), 20250104
    Link to Paper Search Results by DOI
  45. Efficiency improvement of spin-resolved ARPES experiments using Gaussian process regression, SCIENTIFIC REPORTS, 14(1), 20240923
    Link to Paper Search Results by DOI
  46. Emergence of quasi-1D spin-polarized states in ultrathin Bi films on InAs(111)A for spintronics applications, NANOSCALE, 16(3), 1272-1281, 20240118
    Link to Paper Search Results by DOI
  47. Laser-based angle-resolved photoemission spectroscopy with micrometer spatial resolution and detection of three-dimensional spin vector, SCIENTIFIC REPORTS, 14(1), 20240104
    Link to Paper Search Results by DOI
  48. Spiral band structure hidden in the bulk chiral crystal NbSi2, PHYSICAL REVIEW B, 108(23), 20231221
    Link to Paper Search Results by DOI
  49. One-Dimensional Band Structure in Quasi-Two-Dimensional η-Mo4O11 Revealed by Angle-Resolved Photoelectron Spectroscopy and First-Principles Calculation, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 92(8), 20230815
    Link to Paper Search Results by DOI
  50. Exploring spin-polarization in Bi-based high-Tc cuprates, SCIENTIFIC REPORTS, 13(1), 20230818
    Link to Paper Search Results by DOI
  51. Surface electronic structure of Re(0001): A spin-resolved photoemission study, PHYSICAL REVIEW B, 107(16), 20230426
    Link to Paper Search Results by DOI
  52. Systematic study of electronic states of Ln(O,F)BiS2 by spin- and angle-resolved photoemission spectroscopy, PHYSICAL REVIEW B, 106(10), 20220920
    Link to Paper Search Results by DOI
  53. Domain Dependent Fermi Arcs Observed in a Striped Phase Dichalcogenide, ADVANCED QUANTUM TECHNOLOGIES, 5(9), 202209
    Link to Paper Search Results by DOI
  54. Distinct Tamm and Shockley surface states on Re(0001) mixed by spin-orbit interaction, PHYSICAL REVIEW B, 105(24), 20220630
    Link to Paper Search Results by DOI
  55. Hexagonally Deformed Fermi Surface of the 3D Topological Insulator Bi2Se3, PHYSICAL REVIEW LETTERS, 105(7), 20100810
    Link to Paper Search Results by DOI
  56. Experimental Realization of a Three-Dimensional Topological Insulator Phase in Ternary Chalcogenide TlBiSe2, PHYSICAL REVIEW LETTERS, 105(14), 20100928
    Link to Paper Search Results by DOI
  57. Surface Scattering via Bulk Continuum States in the 3D Topological Insulator Bi2Se3, PHYSICAL REVIEW LETTERS, 107(5), 20110727
    Link to Paper Search Results by DOI
  58. Spin-Polarized Dirac-Cone-Like Surface State with d Character at W(110), PHYSICAL REVIEW LETTERS, 108(6), 20120210
    Link to Paper Search Results by DOI
  59. Experimental Verification of PbBi2Te4 as a 3D Topological Insulator, PHYSICAL REVIEW LETTERS, 108(20), 20120515
    Link to Paper Search Results by DOI
  60. Quasiparticle interference on the surface of Bi2Se3 induced by cobalt adatom in the absence of ferromagnetic ordering, PHYSICAL REVIEW B, 85(20), 20120529
    Link to Paper Search Results by DOI
  61. Perpendicular magnetic anisotropy with enhanced orbital moments of Fe adatoms on a topological surface of Bi2Se3, JOURNAL OF PHYSICS-CONDENSED MATTER, 25(23), 20130612
    Link to Paper Search Results by DOI
  62. Topological Surface States with Persistent High Spin Polarization across the Dirac Point in Bi2Te2Se and Bi2Se2Te, PHYSICAL REVIEW LETTERS, 109(16), 20121017
    Link to Paper Search Results by DOI
  63. Massless or heavy due to two-fold symmetry: Surface-state electrons at W(110), PHYSICAL REVIEW B, 86(16), 20121018
    Link to Paper Search Results by DOI
  64. Observation of a highly spin-polarized topological surface state in GeBi2Te4, PHYSICAL REVIEW B, 86(19), 20121106
    Link to Paper Search Results by DOI
  65. Photoelectron Spin-Polarization Control in the Topological Insulator Bi2Se3, PHYSICAL REVIEW LETTERS, 112(7), 20140220
    Link to Paper Search Results by DOI
  66. ★, Substrate dependence of anisotropic electronic structure in Ag(111) quantum film studied by angle-resolved photoelectron spectroscopy, Phys. Rev. B, 20080901
  67. ★, Nanoscale chemical imaging by scanning tunneling microscopy assisted by synchrotron radiation, Phys. Rev. Lett., 102, 105503, 20090301
  68. High-efficiency and high energy-resolution spin-polarized photoemission spectrometer, Eur. Phys. J. Special Topics, 169, 181, 20090501
  69. ★, A new spin-polarized photoemission spectrometer with very high efficiency and energy resolution, Rev. Sci. Instrum., 79, 123117, 20081231
  70. Spin polarization of quantum well states in Ag films induced by the Rashba effect at the surface, Phys. Rev. Lett., 101, 107604, 20080601
  71. Hidden surface states on pristine and H-passivated Ni(111): Angle-resolved photoemission and density-functional calculations, Phys. Rev. B, 77, 075415, 20080301
  72. Elementally specific imaging by scanning tunneling microscopy combined with synchrotron radiation light source, Appl. Phys. Lett., 89, 23119, 20070701
  73. Scanning tunneling microscope combined with synchrotron-radiation for element specific analysis, J. Electron Spectrosc. Relat. Phenom., 144-147, 1157, 20050901
  74. Structural Analysis of Ba-induced reconstructions of Si(111) surfaces by Core-level spectroscopy, Phys. Rev. B, 71, 085317, 20050606
  75. Surface states band structure of Gd-induced one-dimensional chain structure on Si(111) surface measured by angle-resolved photoelectron spectroscopy, J. Electron Spectrosc. Relat. Phenom., 137-140, 125, 20040606
  76. Magnetic domain imaging of Ni micro-rings and micro-dots array by photoelectron emission microscope, Jpn. J. Appl. Phys., 43, 4179, 20040101
  77. Symmetry Analysis of the Fermi Surface States of Sr2RuO4 by Display Type Photoelectron Spectroscopy, J. Phys. Soc. Jpn., 68, 1398, 19990101
  78. Two-dimensional band mapping of 2H-TaSe2 using a display type photoelectron spectrometer, J. Electron Spectrosc. Relat. Phenom., 103, 355, 19990101
  79. Two-dimensional angle resolved resonance photoelectron spectroscopy of 1T-TaS2, J. Electron Spectrosc. Relat. Phenom., 88-91, 287, 19980101
  80. Fermi surface of Sr2RuO4 studied by two-dimensional angle resolved photoelectron spectroscopy, J. Electron Spectrosc. Relat. Phenom., 88-91, 473, 19980101
  81. Surface core level shifts of the Au adsorbed Si(111) reconstructed surfaces, J. Electron Spectrosc. Relat. Phenom., 80, 229, 19960101
  82. Substrate dependence of anisotropic electronic structure in Ag(111) quantum film studied by angle-resolved photoelectron spectroscopy, PHYSICAL REVIEW B, 80(11), 200909
    Link to Paper Search Results by DOI
  83. Exchange splitting of the three Gamma surface states of Ni(111) from three-dimensional spin- and angle-resolved photoemission spectroscopy, PHYSICAL REVIEW B, 80(18), 200911
    Link to Paper Search Results by DOI
  84. Complete Assignment of Spin Domains in Antiferromagnetic NiO(100) by Photoemission Electron Microscopy and Cluster Model Calculation, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 79(1), 201001
    Link to Paper Search Results by DOI
  85. Spin-polarized surface bands of a three-dimensional topological insulator studied by high-resolution spin- and angle-resolved photoemission spectroscopy, NEW JOURNAL OF PHYSICS, 12, 20100617
    Link to Paper Search Results by DOI
  86. Large Rashba spin splitting of a metallic surface-state band on a semiconductor surface, NATURE COMMUNICATIONS, 1, 201005
    Link to Paper Search Results by DOI
  87. Spin-polarized semiconductor surface states localized in subsurface layers, PHYSICAL REVIEW B, 82(20), 20101111
    Link to Paper Search Results by DOI
  88. Dynamics of Magnetostatically Coupled Vortices Observed by Time-Resolved Photoemission Electron Microscopy, JAPANESE JOURNAL OF APPLIED PHYSICS, 50(5), 201105
    Link to Paper Search Results by DOI
  89. ★, Efficient spin resolved spectroscopy observation machine at Hiroshima Synchrotron Radiation Center, REVIEW OF SCIENTIFIC INSTRUMENTS, 82(10), 201110
    Link to Paper Search Results by DOI
  90. Giant Rashba-type spin splitting in bulk BiTeI, NATURE MATERIALS, 10(7), 521-526, 201107
    Link to Paper Search Results by DOI
  91. Direct observation of spin configuration in an exchange coupled Fe/NiO(100) system by x-ray magnetic circular- and linear- dichroism photoemission electron microscope, JOURNAL OF APPLIED PHYSICS, 110(8), 20111015
    Link to Paper Search Results by DOI
  92. Development and Application of Multiple-Probe Scanning Probe Microscopes, ADVANCED MATERIALS, 24(13), 1675-1692, 20120403
    Link to Paper Search Results by DOI
  93. Three-dimensional spin orientation in antiferromagnetic domain walls of NiO studied by x-ray magnetic linear dichroism photoemission electron microscopy, PHYSICAL REVIEW B, 85(10), 20120329
    Link to Paper Search Results by DOI
  94. Direct observation of twin domains of NiO(100) by x-ray linear dichroism at the O K edge using photoemission electron microscopy, PHYSICAL REVIEW B, 85(17), 20120501
    Link to Paper Search Results by DOI
  95. Negative spin polarization at the Fermi level in Fe4N epitaxial films by spin-resolved photoelectron spectroscopy, JOURNAL OF APPLIED PHYSICS, 112(1), 20120701
    Link to Paper Search Results by DOI
  96. Status of pump-probe time-resolved photoemission electron microscopy at SPring-8, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 185(10), 389-394, 201210
    Link to Paper Search Results by DOI
  97. Spin- and Angle-Resolved Photoemission of Strongly Spin-Orbit Coupled Systems, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 82(2), 201302
    Link to Paper Search Results by DOI
  98. Tuning of magnetic and transport properties in Bi2Te3 by divalent Fe doping, PHYSICAL REVIEW B, 87(20), 20130515
    Link to Paper Search Results by DOI
  99. Unoccupied topological surface state in Bi2Te2Se, PHYSICAL REVIEW B, 88(8), 20130805
    Link to Paper Search Results by DOI
  100. Electronic and spin structures of solids investigated by means of synchrotron radiation photoemission, RADIATION PHYSICS AND CHEMISTRY, 93, 14-20, 201312
    Link to Paper Search Results by DOI
  101. Exceptional behavior of d-like surface resonances on W(110): the one-step model in its density matrix formulation, NEW JOURNAL OF PHYSICS, 16, 20140102
    Link to Paper Search Results by DOI
  102. The gigantic Rashba effect of surface states energetically buried in the topological insulator Bi2Te2Se, NEW JOURNAL OF PHYSICS, 16, 20140624
    Link to Paper Search Results by DOI
  103. ★, Valley-dependent spin polarization in bulk MoS2 with broken inversion symmetry, NATURE NANOTECHNOLOGY, 9(8), 611-617, 201408
    Link to Paper Search Results by DOI
  104. Direct observation of the spin polarization in Au atomic wires on Si(553), NEW JOURNAL OF PHYSICS, 16, 20140923
    Link to Paper Search Results by DOI
  105. Reflectivity and Sherman Maps of Passivated Fe(001): Working Points for a Display-Type Spin-Polarization Analyzer, PHYSICAL REVIEW APPLIED, 1(5), 20140611
    Link to Paper Search Results by DOI
  106. Spin-Polarized Angle-Resolved Photoelectron Spectroscopy of the So-Predicted Kondo Topological Insulator SmB6, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 83(1), 201401
    Link to Paper Search Results by DOI
  107. Report on PacSurf 2014, Shinku, 58(5), 185-186, 2015
  108. Tunable spin current due to bulk insulating property in the topological insulator Tl1-xBi1+xSe2-delta, PHYSICAL REVIEW B, 91(20), 20150518
    Link to Paper Search Results by DOI
  109. Experimental surface-state band structure of the Ba-induced Si(111) 3 × 1 surface, Physical Review B - Condensed Matter and Materials Physics, 64(16), 1653121-1653127, 20011015
  110. Linear and circular dichroism in photoemission angular distribution from the valence band of 1T-TaS2, Physical Review B - Condensed Matter and Materials Physics, 56(12), 7687-7693, 19970915
  111. Exceptional behavior of d-like surface resonances on W(110): the one-step model in its density matrix formulation, NEW JOURNAL OF PHYSICS, 16, 2014
  112. Photoelectron Spin-Polarization Control in the Topological Insulator Bi2Se3, PHYSICAL REVIEW LETTERS, 112(7), 2014
  113. Anisotropic electronic conduction in metal nanofilms grown on a one-dimensional surface superstructure, PHYSICAL REVIEW B, 89(12), 2014
  114. Reflectivity and Sherman Maps of Passivated Fe(001): Working Points for a Display-Type Spin-Polarization Analyzer, PHYSICAL REVIEW APPLIED, 1(5), 2014
  115. Observation of Micro-Magnetic Structures by Synchrotron Radiation Photoelectron Emission Microscopy, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 82(2), 2013
  116. Tuning of magnetic and transport properties in Bi2Te3 by divalent Fe doping, PHYSICAL REVIEW B, 87(20), 2013
  117. Perpendicular magnetic anisotropy with enhanced orbital moments of Fe adatoms on a topological surface of Bi2Se3, JOURNAL OF PHYSICS-CONDENSED MATTER, 25(23), 2013
  118. Electronic and spin structures of solids investigated by means of synchrotron radiation photoemission, RADIATION PHYSICS AND CHEMISTRY, 93, 14-20, 2013
  119. ★, Experimental Evidence of Hidden Topological Surface States in PbBi4Te7, PHYSICAL REVIEW LETTERS, 111(20), 2013
  120. Experimental verification of the surface termination in the topological insulator TlBiSe2 using core-level photoelectron spectroscopy and scanning tunneling microscopy, PHYSICAL REVIEW B, 88(24), 2013
  121. Spin-Polarized Angle-Resolved Photoelectron Spectroscopy of the So-Predicted Kondo Topological Insulator SmB6, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 83(1), 2014
  122. Perpendicular magnetic anisotropy with enhanced orbital moments of Fe adatoms on a topological surface of Bi2Se3., Perpendicular magnetic anisotropy with enhanced orbital moments of Fe adatoms on a topological surface of Bi2Se3., 25(23), 2013
  123. Experimental verification of the surface termination in the topological insulator TlBiSe2 using core-level photoelectron spectroscopy and scanning tunneling microscopy, Physical Review B - Condensed Matter and Materials Physics, 88(24), 20131223
  124. ★, A double VLEED spin detector for high-resolution three dimensional spin vectorial analysis of anisotropic Rashba spin splitting, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 201, 23-29, 201505
    Link to Paper Search Results by DOI
  125. Spin polarization of surface states on W(110): Combined influence of spin-orbit interaction and hybridization, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 201, 53-59, 201505
    Link to Paper Search Results by DOI
  126. Lifshitz transition and Van Hove singularity in a three-dimensional topological Dirac semimetal, PHYSICAL REVIEW B, 92(7), 20150810
    Link to Paper Search Results by DOI
  127. Tunable spin helical Dirac quasiparticles on the surface of three-dimensional HgTe, PHYSICAL REVIEW B, 92(11), 20150922
    Link to Paper Search Results by DOI
  128. Spin-orbit influence on dz2-type surface state at Ta(110), PHYSICAL REVIEW B, 92(16), 20151019
    Link to Paper Search Results by DOI
  129. Topologically protected surface states in a centrosymmetric superconductor beta-PdBi2, NATURE COMMUNICATIONS, 6, 201510
    Link to Paper Search Results by DOI
  130. Layer-dependent quantum cooperation of electron and hole states in the anomalous semimetal WTe2, NATURE COMMUNICATIONS, 7, 201602
    Link to Paper Search Results by DOI
  131. Orbital-symmetry-selective spin characterization of Dirac-cone-like state on W(110), PHYSICAL REVIEW B, 93(16), 20160408
    Link to Paper Search Results by DOI
  132. Photoelectron spin polarization in the Bi2Te3(0001) topological insulator: Initial- and final-state effects in the photoemission process, PHYSICAL REVIEW B, 93(24), 20160627
    Link to Paper Search Results by DOI
  133. Exchange coupling and spin structure in cobalt-on-chromia thin films, EPL, 115(1), 201607
    Link to Paper Search Results by DOI
  134. Hidden Rashba spin-split states in a quasi-one-dimensional Au atomic chain on ferromagnetic Ni(110), PHYSICAL REVIEW B, 94(24), 20161215
    Link to Paper Search Results by DOI
  135. Surface Kondo effect and non-trivial metallic state of the Kondo insulator YbB12, NATURE COMMUNICATIONS, 7, 20160831
    Link to Paper Search Results by DOI
  136. Observation of the spin-polarized surface state in a noncentrosymmetric superconductor BiPd, NATURE COMMUNICATIONS, 7, 20161107
    Link to Paper Search Results by DOI
  137. Direct observation of spin-layer locking by local Rashba effect in monolayer semiconducting PtSe2 film, Nature Communications, 8, 20170131
    Link to Paper Search Results by DOI
  138. Surface core level shifts of the Au adsorbed Si(111) reconstructed surfaces, Journal of Electron Spectroscopy and Related Phenomena, 80, 229-232, 19960501
  139. Angle-resolved photoelectron spectroscopy of the Si(111)3×1-Na surface, Physical Review B - Condensed Matter and Materials Physics, 55(11), 6762-6765, 19970315
  140. Titanium-induced charge of Si(001) surface dependent on local configuration, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 192, 35-39, 2014
  141. Titanium-induced charge of Si(001) surface dependent on local configuration (vol 192, pg 35, 2014), JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 198, 69-69, 2015
  142. Angle-resolved photoemission study of MxTiS2 (M=Mn, Fe, Co, Ni; x=1/3, 1/4), Journal of Electron Spectroscopy and Related Phenomena, 78, 477-480, 19960501
  143. Two-dimensional angular distribution of photoemission spectra from the valence band of 1T-TaS2, Journal of Electron Spectroscopy and Related Phenomena, 78, 489-492, 19960501
  144. Surface and bulk core level shifts of the Si(111) 3 × 1-Na and Si(111) δ7 × 7-Na surfaces, Surface Science, 321(1-2), 105-110, 19941210
  145. Unusual two-dimensional angular distribution of photoelectrons of Kish graphite and 1T-TaS2, Solid State Communications, 98(7), 671-675, 19960501
  146. Symmetry analysis of the Fermi surface of Bi2Sr2CaCu2O8 by display analyzer, Journal of Electron Spectroscopy and Related Phenomena, 88-91, 489-493, 19980301
  147. Temperature evolution of the photoemission spectra for the Si(111) surface using the laser annealing method, Surface Review and Letters, 9(2), 769-774, 20020401
  148. Electronic structure of Ag thin films on a Ge(001) surface, Surface Review and Letters, 9(2), 681-686, 20020401
  149. Spin arrangement of the Mn/Fe(001) system investigated by spin-polarized photoelectron diffraction, Surface Review and Letters, 9(2), 901-906, 20020401
  150. Determining the surface atomic structure of an oxygen-covered W(001) surface by solving the inverse band-structure problem, Japanese Journal of Applied Physics, Part 2: Letters, 41(5), L527-L529, 20020501
  151. Atomic and electronic structures of Si(1 1 3)1 × 1-Sb surface: Core-level shifts and surface states, Surface Science, 513(1), 49-56, 20020701
  152. Core-level photoemission of the Si(1 1 1)-√21 × √21-Ag surface using synchrotron radiation, Applied Surface Science, 190(1-4), 121-128, 20020508
  153. Si(111)-√21 × √21-(Ag+Cs) surface studied by scanning tunneling microscopy and angle-resolved photoemission spectroscopy, Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, 42(7 B), 4659-4662, 20030701
  154. Electronic evidence of asymmetry in the Si(111)√3 × √3-Ag structure, Physical Review B - Condensed Matter and Materials Physics, 68(8), 854071-854075, 20030801
  155. The Present and Future of Nano-Lithography Using Scanning Probes-How to Measure the Properties of Nano-Lithographed Structures-, Journal of the Surface Science Society of Japan, 19(11), 698-707, 199811
  156. How to measure the nanoscale physical properties of materials, 67(12), 1361-1369, 19981210
  157. Two-Dimensional Surface Adatom of Gas Phase and Core-Level Photoemission Spectroscopy, J. Surf. Sci. Soc. Jpn., 24(9), 556-562, 20030910
  158. Development of High Efficiency Spin-polarized Photoemission Spectrometer and the Applications to Surface Science, J. Surf. Sci. Soc. Jpn., 30(6), 312-318, 20090610
  159. Scanning Tunneling Microscopy Assisted by Synchrotron Radiation Light for High-resolution Element Specific Imaging, J. Surf. Sci. Soc. Jpn., 31(9), 452-458, 20100910
  160. Spin-Split Quantum-Well States Induced by Hybridization with Rashba-Split Surface States, J. Surf. Sci. Soc. Jpn., 31(9), 493-499, 20100910
  161. High-Resolution Element specific Analysis with Scanning Tunneling Microscope Assisted by Synchrotron Radiation Light, 47(1), 14-17, 20120330
  162. High-Efficient Spin- and Angle-Resolved Photoemission Spectroscopy for Bi_2Te_2Se and Bi_2Se_2Te, 34(7), 374-379, 20130710
  163. Experimental realization of type-II Weyl state in noncentrosymmetric TaIrTe4, PHYSICAL REVIEW B, 95(24), 20170612
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  164. Large-Gap Magnetic Topological Heterostructure Formed by Subsurface Incorporation of a Ferromagnetic Layer, NANO LETTERS, 17(6), 3493-3500, 201706
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  165. Adsorbate doping of MoS2 and WSe2: the influence of Na and Co, JOURNAL OF PHYSICS-CONDENSED MATTER, 29(28), 20170719
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  166. High quality atomically thin PtSe2 films grown by molecular beam epitaxy, 2D MATERIALS, 4(4), 201712
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  167. Experimental realization of two-dimensional Dirac nodal line fermions in monolayer Cu2Si, NATURE COMMUNICATIONS, 8, 20171018
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  168. ★, Recent trends in spin-resolved photoelectron spectroscopy, JOURNAL OF PHYSICS-CONDENSED MATTER, 29(48), 20171206
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  169. ★, Direct evidence of hidden local spin polarization in a centrosymmetric superconductor LaO0.55F0.45BiS2, NATURE COMMUNICATIONS, 8, 20171204
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  170. Discovery of 2D Anisotropic Dirac Cones, ADVANCED MATERIALS, 30(2), 20180111
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  171. ★, Peculiar Rashba spin texture induced by C-3v symmetry on the Bi(111) surface revisited, PHYSICAL REVIEW B, 97(8), 20180223
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  172. Location of the valence band maximum in the band structure of anisotropic 1T '-ReSe2, PHYSICAL REVIEW B, 97(16), 20180418
    Link to Paper Search Results by DOI
  173. Experimental observation of node-line-like surface states in LaBi, PHYSICAL REVIEW B, 97(15), 20180425
    Link to Paper Search Results by DOI
  174. Electronic and spin structure of the wide-band-gap topological insulator: Nearly stoichiometric Bi2Te2S, PHYSICAL REVIEW B, 97(20), 20180510
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  175. Circular-polarized-light-induced spin polarization characterized for the Dirac-cone surface state at W(110) with C-2v symmetry, SCIENTIFIC REPORTS, 8, 20180711
    Link to Paper Search Results by DOI
  176. Enhanced surface state protection and band gap in the topological insulator PbBi4Te4S3, PHYSICAL REVIEW MATERIALS, 2(10), 20181001
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  177. Multiple topological states in iron-based superconductors, NATURE PHYSICS, 15(1), 41-+, 201901
    Link to Paper Search Results by DOI
  178. Non-trivial surface states of samarium hexaboride at the (111) surface, NATURE COMMUNICATIONS, 10, 20190524
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  179. Crossover from 2D metal to 3D Dirac semimetal in metallic PtTe2 films with local Rashba effect, SCIENCE BULLETIN, 64(15), 1044-1048, 20190815
    Link to Paper Search Results by DOI
  180. Discovery of Weyl Nodal Lines in a Single-Layer Ferromagnet, PHYSICAL REVIEW LETTERS, 123(11), 20190912
    Link to Paper Search Results by DOI
  181. Disentangling orbital and spin textures of surface-derived states in non-symmorphic semimetal HfSiS, PHYSICAL REVIEW B, 100(20), 20191127
    Link to Paper Search Results by DOI
  182. Weyl-like points from band inversions of spin-polarised surface states in NbGeSb, NATURE COMMUNICATIONS, 10, 20191202
    Link to Paper Search Results by DOI
  183. Spectroscopic evidence of quasi-one-dimensional metallic Rashba spin-split states on the Si(111)5 x 2-Au surface, PHYSICAL REVIEW B, 101(4), 20200129
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  184. Radial Spin Texture in Elemental Tellurium with Chiral Crystal Structure, PHYSICAL REVIEW LETTERS, 124(13), 20200330
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  185. Switching of band inversion and topological surface states by charge density wave, NATURE COMMUNICATIONS, 11(1), 20200518
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  186. Cubic Rashba Effect in the Surface Spin Structure of Rare-Earth Ternary Materials, PHYSICAL REVIEW LETTERS, 124(23), 20200612
    Link to Paper Search Results by DOI
  187. Distinct Topological Surface States on the Two Terminations of MnBi4Te7, PHYSICAL REVIEW X, 10(3), 20200716
    Link to Paper Search Results by DOI
  188. Topologically Nontrivial Phase-Change Compound GeSb2Te4, ACS NANO, 14(7), 9059-9065, 20200728
    Link to Paper Search Results by DOI
  189. Probe-dependent Dirac-point gap in the gadolinium-doped thallium-based topological insulator TlBi0.9Gd0.1Se2, PHYSICAL REVIEW B, 102(8), 20200826
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  190. Experimental verification of a temperature-induced topological phase transition in TIBiS2 and TIBiSe2, PHYSICAL REVIEW B, 102(12), 20200928
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  191. Nature of the Dirac gap modulation and surface magnetic interaction in axion antiferromagnetic topological insulator MnBi2Te4, SCIENTIFIC REPORTS, 10(1), 20200806
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  192. Fabrication of a novel magnetic topological heterostructure and temperature evolution of its massive Dirac cone, NATURE COMMUNICATIONS, 11(1), 20200924
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  193. Spin-polarized Weyl cones and giant anomalous Nernst effect in ferromagnetic Heusler films, COMMUNICATIONS MATERIALS, 1(1), 20201124
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  194. Profiling spin and orbital texture of a topological insulator in full momentum space, PHYSICAL REVIEW B, 103(16), 20210415
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  195. Realization of a tunable surface Dirac gap in Sb-doped MnBi2Te4, PHYSICAL REVIEW B, 103(12), 20210317
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  196. Experimental Observation and Spin Texture of Dirac Node Arcs in Tetradymite Topological Metals, PHYSICAL REVIEW LETTERS, 126(19), 20210514
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  197. Adlayer influence on Dirac-type surface state at W(110), JOURNAL OF PHYSICS-CONDENSED MATTER, 33(28), 20210714
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  198. Tunneling current modulation in atomically precise graphene nanoribbon heterojunctions, NATURE COMMUNICATIONS, 12(1), 20210505
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  199. Large out-of-plane spin polarization in a spin-splitting one-dimensional metallic surface state on Si(557)-Au, PHYSICAL REVIEW B, 82(16), 2010
  200. Status of pump-probe time-resolved photoemission electron microscopy at SPring-8, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 185(10), 389-394, 2012
  201. Status of pump-probe time-resolved photoemission electron microscopy at SPring-8, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 185(10), 389-394, 2012
  202. Status of pump-probe time-resolved photoemission electron microscopy at SPring-8, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 185(10), 389-394, 2012
  203. Electronic structure of the hole-doped delafossite oxides CuCr1-xMgxO2, PHYSICAL REVIEW B, 87(19), 2013
  204. Electronic structure of the hole-doped delafossite oxides CuCr1-xMgxO2, PHYSICAL REVIEW B, 87(19), 2013
  205. Electronic structure of the hole-doped delafossite oxides CuCr1-xMgxO2, PHYSICAL REVIEW B, 87(19), 2013
  206. Surface electronic structure of ordered alkali- and noble metal-overlayers on Si(111), Applied Surface Science, 121-122, 89-97, 19971101
  207. Domain imaging of mesoscopic magnetic structures by photoelectron emission microscopy, Surface Review and Letters, 9(1), 365-369, 20020201
  208. Observation of Magnetic Domain Structure of Micro Magnetic Materials and Magnetic Thin Films by Photoemisson Electron Microscope(PEEM), Journal of the Surface Science Society of Japan, 26(1), 19-27, 20050110
  209. Development of a Scanning Tunneling Microscope Combined with a Synchrotron Radiation Light Source, Journal of the Surface Science Society of Japan, 26(12), 752-756, 20051210
  210. Spectroscopy Studies of Temperature-Induced Valence Transition on EuNi_2(Si_<1-x>Ge_x)2 around Eu 3d-4f, 4d-4f and Ni 2p-3d Excitation Regions, Journal of the Physical Society of Japan, 71(1), 148-155, 20020115
  211. 14aXD-2 Antifferomagnetic domain imaging of NiO(100) by SR-PEEM at O Kedge, Meeting abstracts of the Physical Society of Japan, 59(2), 20040825
  212. 14aXD-6 X-ray Photoemission Electron Microscopy study of Fe wedge on NiO(100), Meeting abstracts of the Physical Society of Japan, 59(2), 20040825
  213. Development and Research of SR Light-illuminated STM, Meeting abstracts of the Physical Society of Japan, 58(2), 20030815
  214. Kagome-like structure of germanene on Al(111), PHYSICAL REVIEW B, 104(8), 20210803
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  215. Observation of Spin-Momentum-Layer Locking in a Centrosymmetric Crystal, PHYSICAL REVIEW LETTERS, 127(12), 20210914
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  216. Rashba-type splitting of the Au(110) surface state: A combined inverse and direct photoemission study, PHYSICAL REVIEW B, 104(16), 20211004
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Publications such as books

  1. Compendium of Surface and Interface Analysis, Springer Nature Singapore Pte Ltd., 2018, Dictionary/Encyclopedia, Joint work, 978-981-10-6155-4

Invited Lecture, Oral Presentation, Poster Presentation

  1. Anisotropic Electronic Structures on Silver Thin Films Induced by Substrates with Low-dimensional Superstructures, 2009/10, With Invitation, English
  2. Development and applications of high-efficient spin-resolved photoelectron spectroscopy, 2010/01, With Invitation, English
  3. Synchrotron radiation-assisted scanning tunneling microscopy for nanometer scale chemical analysis, 2009/12, With Invitation, English
  4. Development and Applications of A New Spin-polarized Photoemission Spectrometer with High Efficiency and Energy Resolution, 2009/03, With Invitation, English
  5. Real space chemical imaging by combining STM and photoemission techniques: toward sub-10 nm resolution, 2008/09, With Invitation, English
  6. Spin-resolved photoelectron Spectroscopy, Taichi Okuda, 7th Surface Nano-Science Workshop, 2011/11/19, With Invitation, English
  7. Observation of spin-polarized surface states induced by spin-orbit interaction by high-resolution spin-polarized photoelectron spectroscopy, Taichi Okuda, International workshop on Strong correlations and angle-resolved photoemission spectroscopy (CORPES13), 2013/07/29, With Invitation, English
  8. Exploring of spin-polarized surface states by highly-efficient spin-polarized photoelectron spectroscopy, Taichi Okuda, Fall meeting of Korea Physical Scoiety, 2013/10/31, With Invitation, English
  9. Investigation of peculiar spin electronic states induced by spin-orbit interaction using high-resolution spin-resolved photoemission, Taichi Okuda, Pacific rim symposium on Surfaces, Coatings and Interfaces (Pacsurf2014), 2014/12/08, With Invitation, English
  10. High-resolution spin vectorial measurement on spin-orbit interaction induced electronic structure of low-dimensional system, Taichi Okuda, Spin-orbit coupling interaction in surface or interface states 2015 (SOCSIS-15), 2015/06/08, With Invitation, English
  11. Spin texture of Au atomic chain on semiconductor and ferromagnetic metal surfaces, Taichi Okuda, Quantum Materials Symposium (QMS16), 2016/02/21, With Invitation, English
  12. Exploration of hidden spin-polarized electron by high-resolution spin- and angle-resolved photoemission, Taichi Okuda, 25th Anniversary of SSSJ Kansai, 2017/01/24, With Invitation, English
  13. Exploration of hidden spin-polarized electronic states by spin-resolved photoemission, Taichi Okuda, 2018/09/04, With Invitation, English

External Funds

Acceptance Results of Competitive Funds

  1. KAKENHI, Improvement of high efficiency spin-resolved photoelectron spectroscopy and 3-dimensional spin analysis of materials for spintronics, 2011, 2013
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  2. KAKENHI, Resolving spin-helical textures of newly developed topological insulator materials, 2011, 2013
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  3. KAKENHI, Development of experimental techniques for femto-second pulsed X-ray source, 2007, 2009
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  4. KAKENHI, Study of surface magnetism by using high-efficient spin-polarized photoelectron spectroscopy, 2007, 2009
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  5. KAKENHI, Observation of ultra-fast magnetic response by a time-resolved photoemission electron microscope, 2006, 2010
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  6. KAKENHI, 2004, 2005
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  7. KAKENHI, Study of the interfaces between magnetic thin films and antiferromagnetic substrates by synchrotron radiation photoelectron emission microscopy, 2003, 2004
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  8. KAKENHI, Development of STM combined with synchrotron-radiation light source and its application to elemental analysis and spin observation, 2002, 2003
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  9. KAKENHI, 2016, 2019

Social Activities

Organizing Academic Conferences, etc.

  1. 15th International Conference on Formation of Semiconductor Interfaces (ICFSI-15), Co-chair of program committee, 2015/01, 2015/11