TAICHI OKUDA

Last Updated :2024/04/03

Affiliations, Positions
Hiroshima Synchrotron Radiation Center, 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. 2024, Undergraduate Education, Second Semester, Exercises in Mechanics
  2. 2024, Undergraduate Education, First Semester, Special Study for Graduation A
  3. 2024, Undergraduate Education, Second Semester, Special Study for Graduation B
  4. 2024, Graduate Education (Master's Program) , 2Term, Special Topics in Synchrotron Radiation Science B
  5. 2024, Graduate Education (Master's Program) , 4Term, Surface Physics
  6. 2024, Graduate Education (Master's Program) , First Semester, Exercise in Physics I
  7. 2024, Graduate Education (Master's Program) , Second Semester, Exercise in Physics II
  8. 2024, Graduate Education (Master's Program) , First Semester, Special Exsecise in Physics A
  9. 2024, Graduate Education (Master's Program) , Second Semester, Special Exsecise in Physics B
  10. 2024, Graduate Education (Master's Program) , Academic Year, Special Research in Physics
  11. 2024, Graduate Education (Doctoral Program) , Academic Year, Special Research in Physics

Research Activities

Academic Papers

  1. Hexagonally Deformed Fermi Surface of the 3D Topological Insulator Bi2Se3, PHYSICAL REVIEW LETTERS, 105(7), 20100810
  2. Experimental Realization of a Three-Dimensional Topological Insulator Phase in Ternary Chalcogenide TlBiSe2, PHYSICAL REVIEW LETTERS, 105(14), 20100928
  3. Surface Scattering via Bulk Continuum States in the 3D Topological Insulator Bi2Se3, PHYSICAL REVIEW LETTERS, 107(5), 20110727
  4. Spin-Polarized Dirac-Cone-Like Surface State with d Character at W(110), PHYSICAL REVIEW LETTERS, 108(6), 20120210
  5. Experimental Verification of PbBi2Te4 as a 3D Topological Insulator, PHYSICAL REVIEW LETTERS, 108(20), 20120515
  6. Quasiparticle interference on the surface of Bi2Se3 induced by cobalt adatom in the absence of ferromagnetic ordering, PHYSICAL REVIEW B, 85(20), 20120529
  7. Perpendicular magnetic anisotropy with enhanced orbital moments of Fe adatoms on a topological surface of Bi2Se3, JOURNAL OF PHYSICS-CONDENSED MATTER, 25(23), 20130612
  8. Topological Surface States with Persistent High Spin Polarization across the Dirac Point in Bi2Te2Se and Bi2Se2Te, PHYSICAL REVIEW LETTERS, 109(16), 20121017
  9. Massless or heavy due to two-fold symmetry: Surface-state electrons at W(110), PHYSICAL REVIEW B, 86(16), 20121018
  10. Observation of a highly spin-polarized topological surface state in GeBi2Te4, PHYSICAL REVIEW B, 86(19), 20121106
  11. Photoelectron Spin-Polarization Control in the Topological Insulator Bi2Se3, PHYSICAL REVIEW LETTERS, 112(7), 20140220
  12. ★, Substrate dependence of anisotropic electronic structure in Ag(111) quantum film studied by angle-resolved photoelectron spectroscopy, Phys. Rev. B, 20080901
  13. ★, Nanoscale chemical imaging by scanning tunneling microscopy assisted by synchrotron radiation, Phys. Rev. Lett., 102, 105503, 20090301
  14. High-efficiency and high energy-resolution spin-polarized photoemission spectrometer, Eur. Phys. J. Special Topics, 169, 181, 20090501
  15. ★, A new spin-polarized photoemission spectrometer with very high efficiency and energy resolution, Rev. Sci. Instrum., 79, 123117, 20081231
  16. Spin polarization of quantum well states in Ag films induced by the Rashba effect at the surface, Phys. Rev. Lett., 101, 107604, 20080601
  17. Hidden surface states on pristine and H-passivated Ni(111): Angle-resolved photoemission and density-functional calculations, Phys. Rev. B, 77, 075415, 20080301
  18. Elementally specific imaging by scanning tunneling microscopy combined with synchrotron radiation light source, Appl. Phys. Lett., 89, 23119, 20070701
  19. Scanning tunneling microscope combined with synchrotron-radiation for element specific analysis, J. Electron Spectrosc. Relat. Phenom., 144-147, 1157, 20050901
  20. Structural Analysis of Ba-induced reconstructions of Si(111) surfaces by Core-level spectroscopy, Phys. Rev. B, 71, 085317, 20050606
  21. 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
  22. Magnetic domain imaging of Ni micro-rings and micro-dots array by photoelectron emission microscope, Jpn. J. Appl. Phys., 43, 4179, 20040101
  23. Symmetry Analysis of the Fermi Surface States of Sr2RuO4 by Display Type Photoelectron Spectroscopy, J. Phys. Soc. Jpn., 68, 1398, 19990101
  24. Two-dimensional band mapping of 2H-TaSe2 using a display type photoelectron spectrometer, J. Electron Spectrosc. Relat. Phenom., 103, 355, 19990101
  25. Two-dimensional angle resolved resonance photoelectron spectroscopy of 1T-TaS2, J. Electron Spectrosc. Relat. Phenom., 88-91, 287, 19980101
  26. Fermi surface of Sr2RuO4 studied by two-dimensional angle resolved photoelectron spectroscopy, J. Electron Spectrosc. Relat. Phenom., 88-91, 473, 19980101
  27. Surface core level shifts of the Au adsorbed Si(111) reconstructed surfaces, J. Electron Spectrosc. Relat. Phenom., 80, 229, 19960101
  28. Substrate dependence of anisotropic electronic structure in Ag(111) quantum film studied by angle-resolved photoelectron spectroscopy, PHYSICAL REVIEW B, 80(11), 200909
  29. 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
  30. 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
  31. 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
  32. Large Rashba spin splitting of a metallic surface-state band on a semiconductor surface, NATURE COMMUNICATIONS, 1, 201005
  33. Spin-polarized semiconductor surface states localized in subsurface layers, PHYSICAL REVIEW B, 82(20), 20101111
  34. Dynamics of Magnetostatically Coupled Vortices Observed by Time-Resolved Photoemission Electron Microscopy, JAPANESE JOURNAL OF APPLIED PHYSICS, 50(5), 201105
  35. ★, Efficient spin resolved spectroscopy observation machine at Hiroshima Synchrotron Radiation Center, REVIEW OF SCIENTIFIC INSTRUMENTS, 82(10), 201110
  36. Giant Rashba-type spin splitting in bulk BiTeI, NATURE MATERIALS, 10(7), 521-526, 201107
  37. 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
  38. Development and Application of Multiple-Probe Scanning Probe Microscopes, ADVANCED MATERIALS, 24(13), 1675-1692, 20120403
  39. 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
  40. 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
  41. Negative spin polarization at the Fermi level in Fe4N epitaxial films by spin-resolved photoelectron spectroscopy, JOURNAL OF APPLIED PHYSICS, 112(1), 20120701
  42. Status of pump-probe time-resolved photoemission electron microscopy at SPring-8, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 185(10), 389-394, 201210
  43. Spin- and Angle-Resolved Photoemission of Strongly Spin-Orbit Coupled Systems, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 82(2), 201302
  44. Tuning of magnetic and transport properties in Bi2Te3 by divalent Fe doping, PHYSICAL REVIEW B, 87(20), 20130515
  45. Unoccupied topological surface state in Bi2Te2Se, PHYSICAL REVIEW B, 88(8), 20130805
  46. Electronic and spin structures of solids investigated by means of synchrotron radiation photoemission, RADIATION PHYSICS AND CHEMISTRY, 93, 14-20, 201312
  47. 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
  48. The gigantic Rashba effect of surface states energetically buried in the topological insulator Bi2Te2Se, NEW JOURNAL OF PHYSICS, 16, 20140624
  49. ★, Valley-dependent spin polarization in bulk MoS2 with broken inversion symmetry, NATURE NANOTECHNOLOGY, 9(8), 611-617, 201408
  50. Direct observation of the spin polarization in Au atomic wires on Si(553), NEW JOURNAL OF PHYSICS, 16, 20140923
  51. Reflectivity and Sherman Maps of Passivated Fe(001): Working Points for a Display-Type Spin-Polarization Analyzer, PHYSICAL REVIEW APPLIED, 1(5), 20140611
  52. Spin-Polarized Angle-Resolved Photoelectron Spectroscopy of the So-Predicted Kondo Topological Insulator SmB6, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 83(1), 201401
  53. Report on PacSurf 2014, Shinku, 58(5), 185-186, 2015
  54. Tunable spin current due to bulk insulating property in the topological insulator Tl1-xBi1+xSe2-delta, PHYSICAL REVIEW B, 91(20), 20150518
  55. 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
  56. 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
  57. 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
  58. Photoelectron Spin-Polarization Control in the Topological Insulator Bi2Se3, PHYSICAL REVIEW LETTERS, 112(7), 2014
  59. Anisotropic electronic conduction in metal nanofilms grown on a one-dimensional surface superstructure, PHYSICAL REVIEW B, 89(12), 2014
  60. Reflectivity and Sherman Maps of Passivated Fe(001): Working Points for a Display-Type Spin-Polarization Analyzer, PHYSICAL REVIEW APPLIED, 1(5), 2014
  61. Observation of Micro-Magnetic Structures by Synchrotron Radiation Photoelectron Emission Microscopy, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 82(2), 2013
  62. Tuning of magnetic and transport properties in Bi2Te3 by divalent Fe doping, PHYSICAL REVIEW B, 87(20), 2013
  63. Perpendicular magnetic anisotropy with enhanced orbital moments of Fe adatoms on a topological surface of Bi2Se3, JOURNAL OF PHYSICS-CONDENSED MATTER, 25(23), 2013
  64. Electronic and spin structures of solids investigated by means of synchrotron radiation photoemission, RADIATION PHYSICS AND CHEMISTRY, 93, 14-20, 2013
  65. ★, Experimental Evidence of Hidden Topological Surface States in PbBi4Te7, PHYSICAL REVIEW LETTERS, 111(20), 2013
  66. 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
  67. Spin-Polarized Angle-Resolved Photoelectron Spectroscopy of the So-Predicted Kondo Topological Insulator SmB6, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 83(1), 2014
  68. 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
  69. 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
  70. ★, 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
  71. 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
  72. Lifshitz transition and Van Hove singularity in a three-dimensional topological Dirac semimetal, PHYSICAL REVIEW B, 92(7), 20150810
  73. Tunable spin helical Dirac quasiparticles on the surface of three-dimensional HgTe, PHYSICAL REVIEW B, 92(11), 20150922
  74. Spin-orbit influence on dz2-type surface state at Ta(110), PHYSICAL REVIEW B, 92(16), 20151019
  75. Topologically protected surface states in a centrosymmetric superconductor beta-PdBi2, NATURE COMMUNICATIONS, 6, 201510
  76. Layer-dependent quantum cooperation of electron and hole states in the anomalous semimetal WTe2, NATURE COMMUNICATIONS, 7, 201602
  77. Orbital-symmetry-selective spin characterization of Dirac-cone-like state on W(110), PHYSICAL REVIEW B, 93(16), 20160408
  78. Photoelectron spin polarization in the Bi2Te3(0001) topological insulator: Initial- and final-state effects in the photoemission process, PHYSICAL REVIEW B, 93(24), 20160627
  79. Hidden Rashba spin-split states in a quasi-one-dimensional Au atomic chain on ferromagnetic Ni(110), PHYSICAL REVIEW B, 94(24), 20161215
  80. Surface Kondo effect and non-trivial metallic state of the Kondo insulator YbB12, NATURE COMMUNICATIONS, 7, 20160831
  81. Observation of the spin-polarized surface state in a noncentrosymmetric superconductor BiPd, NATURE COMMUNICATIONS, 7, 20161107
  82. Direct observation of spin-layer locking by local Rashba effect in monolayer semiconducting PtSe2 film, Nature Communications, 8, 20170131
  83. Surface core level shifts of the Au adsorbed Si(111) reconstructed surfaces, Journal of Electron Spectroscopy and Related Phenomena, 80, 229-232, 19960501
  84. 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
  85. Titanium-induced charge of Si(001) surface dependent on local configuration, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 192, 35-39, 2014
  86. 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
  87. 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
  88. 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
  89. 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
  90. Unusual two-dimensional angular distribution of photoelectrons of Kish graphite and 1T-TaS2, Solid State Communications, 98(7), 671-675, 19960501
  91. Symmetry analysis of the Fermi surface of Bi2Sr2CaCu2O8 by display analyzer, Journal of Electron Spectroscopy and Related Phenomena, 88-91, 489-493, 19980301
  92. 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
  93. Electronic structure of Ag thin films on a Ge(001) surface, Surface Review and Letters, 9(2), 681-686, 20020401
  94. Spin arrangement of the Mn/Fe(001) system investigated by spin-polarized photoelectron diffraction, Surface Review and Letters, 9(2), 901-906, 20020401
  95. 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
  96. 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
  97. 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
  98. 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
  99. 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
  100. 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
  101. How to measure the nanoscale physical properties of materials, 67(12), 1361-1369, 19981210
  102. Two-Dimensional Surface Adatom of Gas Phase and Core-Level Photoemission Spectroscopy, J. Surf. Sci. Soc. Jpn., 24(9), 556-562, 20030910
  103. Development of High Efficiency Spin-polarized Photoemission Spectrometer and the Applications to Surface Science, J. Surf. Sci. Soc. Jpn., 30(6), 312-318, 20090610
  104. Scanning Tunneling Microscopy Assisted by Synchrotron Radiation Light for High-resolution Element Specific Imaging, J. Surf. Sci. Soc. Jpn., 31(9), 452-458, 20100910
  105. Spin-Split Quantum-Well States Induced by Hybridization with Rashba-Split Surface States, J. Surf. Sci. Soc. Jpn., 31(9), 493-499, 20100910
  106. High-Resolution Element specific Analysis with Scanning Tunneling Microscope Assisted by Synchrotron Radiation Light, 47(1), 14-17, 20120330
  107. High-Efficient Spin- and Angle-Resolved Photoemission Spectroscopy for Bi_2Te_2Se and Bi_2Se_2Te, 34(7), 374-379, 20130710
  108. Experimental realization of type-II Weyl state in noncentrosymmetric TaIrTe4, PHYSICAL REVIEW B, 95(24), 20170612
  109. Large-Gap Magnetic Topological Heterostructure Formed by Subsurface Incorporation of a Ferromagnetic Layer, NANO LETTERS, 17(6), 3493-3500, 201706
  110. Adsorbate doping of MoS2 and WSe2: the influence of Na and Co, JOURNAL OF PHYSICS-CONDENSED MATTER, 29(28), 20170719
  111. High quality atomically thin PtSe2 films grown by molecular beam epitaxy, 2D MATERIALS, 4(4), 201712
  112. Experimental realization of two-dimensional Dirac nodal line fermions in monolayer Cu2Si, NATURE COMMUNICATIONS, 8, 20171018
  113. ★, Recent trends in spin-resolved photoelectron spectroscopy, JOURNAL OF PHYSICS-CONDENSED MATTER, 29(48), 20171206
  114. ★, Direct evidence of hidden local spin polarization in a centrosymmetric superconductor LaO0.55F0.45BiS2, NATURE COMMUNICATIONS, 8, 20171204
  115. Discovery of 2D Anisotropic Dirac Cones, ADVANCED MATERIALS, 30(2), 20180111
  116. ★, Peculiar Rashba spin texture induced by C-3v symmetry on the Bi(111) surface revisited, PHYSICAL REVIEW B, 97(8), 20180223
  117. Location of the valence band maximum in the band structure of anisotropic 1T '-ReSe2, PHYSICAL REVIEW B, 97(16), 20180418
  118. Experimental observation of node-line-like surface states in LaBi, PHYSICAL REVIEW B, 97(15), 20180425
  119. Electronic and spin structure of the wide-band-gap topological insulator: Nearly stoichiometric Bi2Te2S, PHYSICAL REVIEW B, 97(20), 20180510
  120. Circular-polarized-light-induced spin polarization characterized for the Dirac-cone surface state at W(110) with C-2v symmetry, SCIENTIFIC REPORTS, 8, 20180711
  121. Enhanced surface state protection and band gap in the topological insulator PbBi4Te4S3, PHYSICAL REVIEW MATERIALS, 2(10), 20181001
  122. Multiple topological states in iron-based superconductors, NATURE PHYSICS, 15(1), 41-+, 201901
  123. Non-trivial surface states of samarium hexaboride at the (111) surface, NATURE COMMUNICATIONS, 10, 20190524
  124. Crossover from 2D metal to 3D Dirac semimetal in metallic PtTe2 films with local Rashba effect, SCIENCE BULLETIN, 64(15), 1044-1048, 20190815
  125. Discovery of Weyl Nodal Lines in a Single-Layer Ferromagnet, PHYSICAL REVIEW LETTERS, 123(11), 20190912
  126. Disentangling orbital and spin textures of surface-derived states in non-symmorphic semimetal HfSiS, PHYSICAL REVIEW B, 100(20), 20191127
  127. Weyl-like points from band inversions of spin-polarised surface states in NbGeSb, NATURE COMMUNICATIONS, 10, 20191202
  128. 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
  129. Radial Spin Texture in Elemental Tellurium with Chiral Crystal Structure, PHYSICAL REVIEW LETTERS, 124(13), 20200330
  130. Switching of band inversion and topological surface states by charge density wave, NATURE COMMUNICATIONS, 11(1), 20200518
  131. Cubic Rashba Effect in the Surface Spin Structure of Rare-Earth Ternary Materials, PHYSICAL REVIEW LETTERS, 124(23), 20200612
  132. Distinct Topological Surface States on the Two Terminations of MnBi4Te7, PHYSICAL REVIEW X, 10(3), 20200716
  133. Topologically Nontrivial Phase-Change Compound GeSb2Te4, ACS NANO, 14(7), 9059-9065, 20200728
  134. Probe-dependent Dirac-point gap in the gadolinium-doped thallium-based topological insulator TlBi0.9Gd0.1Se2, PHYSICAL REVIEW B, 102(8), 20200826
  135. Experimental verification of a temperature-induced topological phase transition in TIBiS2 and TIBiSe2, PHYSICAL REVIEW B, 102(12), 20200928
  136. Nature of the Dirac gap modulation and surface magnetic interaction in axion antiferromagnetic topological insulator MnBi2Te4, SCIENTIFIC REPORTS, 10(1), 20200806
  137. Fabrication of a novel magnetic topological heterostructure and temperature evolution of its massive Dirac cone, NATURE COMMUNICATIONS, 11(1), 20200924
  138. Spin-polarized Weyl cones and giant anomalous Nernst effect in ferromagnetic Heusler films, COMMUNICATIONS MATERIALS, 1(1), 20201124
  139. Profiling spin and orbital texture of a topological insulator in full momentum space, PHYSICAL REVIEW B, 103(16), 20210415
  140. Experimental Observation and Spin Texture of Dirac Node Arcs in Tetradymite Topological Metals, PHYSICAL REVIEW LETTERS, 126(19), 20210514
  141. Adlayer influence on Dirac-type surface state at W(110), JOURNAL OF PHYSICS-CONDENSED MATTER, 33(28), 20210714
  142. Tunneling current modulation in atomically precise graphene nanoribbon heterojunctions, NATURE COMMUNICATIONS, 12(1), 20210505
  143. 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
  144. Status of pump-probe time-resolved photoemission electron microscopy at SPring-8, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 185(10), 389-394, 2012
  145. Status of pump-probe time-resolved photoemission electron microscopy at SPring-8, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 185(10), 389-394, 2012
  146. Status of pump-probe time-resolved photoemission electron microscopy at SPring-8, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 185(10), 389-394, 2012
  147. Electronic structure of the hole-doped delafossite oxides CuCr1-xMgxO2, PHYSICAL REVIEW B, 87(19), 2013
  148. Electronic structure of the hole-doped delafossite oxides CuCr1-xMgxO2, PHYSICAL REVIEW B, 87(19), 2013
  149. Electronic structure of the hole-doped delafossite oxides CuCr1-xMgxO2, PHYSICAL REVIEW B, 87(19), 2013
  150. Surface electronic structure of ordered alkali- and noble metal-overlayers on Si(111), Applied Surface Science, 121-122, 89-97, 19971101
  151. Domain imaging of mesoscopic magnetic structures by photoelectron emission microscopy, Surface Review and Letters, 9(1), 365-369, 20020201
  152. 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
  153. 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
  154. 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

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