ANUP PRADHAN SAKHYA

Last Updated :2026/07/06

Affiliations, Positions
Research Institute for Synchrotron Radiation Science, Assistant Professor
Web Site
https://home.hiroshima-u.ac.jp/~idetas/grouphp/members.html
https://scholar.google.co.in/citations?user=yQvo_dIAAAAJ&hl=en
https://sites.google.com/view/anup-pradhan-sakhya/home
E-mail
anuppradhansakhyahiroshima-u.ac.jp
Self-introduction
My research explores emergent quantum phenomena in quantum materials, with a particular focus on strongly correlated electron systems and topological phases of matter, including Kondo systems, topological insulators, Dirac and Weyl semimetals, nodal-line semimetals, altermagnets, and kagome-based materials. These systems provide a rich platform where symmetry, topology, and electron correlations intertwine, giving rise to unconventional electronic states and emergent quasiparticle excitations. A central theme of my work is the direct investigation of electronic structure using angle-resolved photoemission spectroscopy (ARPES) and its time-resolved variant (tr-ARPES). The properties of quantum materials are fundamentally governed by their electronic structure, encoded in the energy, momentum, and spin of electrons. With advances in synchrotron and laser-based photon sources, along with high-resolution electron analyzers, ARPES has evolved into a powerful momentum-resolved probe of many-body interactions, enabling direct access to quasiparticle dynamics, band renormalization, and electronic coherence in complex materials. In addition, the use of tunable photon polarization (linear and circular) provides sensitivity to orbital symmetry through matrix-element effects, allowing detailed orbital- and symmetry-resolved mapping of electronic states. Beyond equilibrium properties, I investigate ultrafast non-equilibrium dynamics using tr-ARPES, which enables real-time tracking of photoexcited states and relaxation pathways on femtosecond timescales. This approach provides direct insight into how topological, kagome, and correlated electronic states evolve under external perturbations and how electron–electron and electron–lattice interactions govern relaxation far from equilibrium. Complementing experiments, I perform first-principles electronic structure calculations based on density functional theory (DFT), using state-of-the-art computational frameworks such as VASP and WIEN2k. These methods provide quantitative insights into band structure, orbital character, and symmetry-driven electronic properties, and play a crucial role in interpreting experimental results and guiding the exploration of new quantum phases. With the continuous discovery of novel quantum materials and rapid advances in both experimental and computational techniques, the combined approach of ARPES, tr-ARPES, and first-principles calculations offers a powerful route to uncover and understand emergent quantum states of matter governed by topology, symmetry, and correlations.

Basic Information

Major Professional Backgrounds

  • 2025/11/01, Hiroshima University, Research Institute for Synchrotron Radiation Science, Assistant Professor
  • 2017/04, 2020/10, Tata Institute of Fundamental Research, Postdoctoral Research Fellow
  • 2021/03, 2025/07, University of Central Florida, Postdoctoral Research Fellow

Educational Backgrounds

  • Bose Institute (University of Calcutta), Department of Physics, Ph.D. (Physics), India, 2011/09, 2017/02

Academic Degrees

  • Mizoram University
  • University of Calcutta

Research Fields

  • Mathematical and physical sciences;Physics;Mathematical physics / Fundamental condensed matter physics

Research Keywords

  • Quantum Materials, Topological Materials, Strongly Correlated Systems, Kondo Physics, Weyl Semimetals, Dirac Semimetals, Altermagnets, Kagome Materials, Electronic Structure, ARPES, tr-ARPES, DFT

Affiliated Academic Societies

  • Life Member, Materials Research Society of India (Membership No. LMB2202).
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  • Life Member, Electron Microscope Society of India (Membership No. LM-934).
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  • Member, American Physical Society (2021–2025).
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Research Activities

Academic Papers

  1. ★, Complex electronic topography and magnetotransport in an in-plane ferromagnetic kagome metal, 10(L051201), L051201-1-L051201-7, 20260511
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  2. ★, Diverse electronic topography in a distorted kagome metal LaTi3Bi4, Physical Review Materials (Lett.), 9(L111201), L111201-1-L111201-6, 20251117
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  3. Observation of multiple van Hove singularities and correlated electronic states in a new topological ferromagnetic kagome metal NdTi3Bi4, Physical Review B (Lett.), 112(L121104), L121104-1-L121104-7, 20250910
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  4. Electronic structure of a nodal line semimetal candidate TbSbTe, Physical Review Materials (Lett.), 9(9), 064202-1-064202-11, 20250605
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  5. ★, Spin density wave and van Hove singularity in the kagome metal CeTi3Bi4, Nature Communications, 16(4384), 1-9, 20250512
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  6. ★, Diverse electronic landscape of the novel kagome metal YbTi3Bi4, Communications Materials, 5(241), 1-7, 20241103
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  7. Revealing the intrinsic electronic structure and complex fermiology of YRu2Si2 using angle-resolved photoemission spectroscopy, Physical Review B, 110(125104), 125104-1-125104-9, 20240903
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  8. Observation of paramagnetic spin-degeneracy lifting in the EuZn2Sb2, Physical Review B, 110(045130), 045130-1-045130-6, 20240716
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  9. Complex Fermiology and Electronic Structure of Antiferromagnet EuSnP, Physical Review Materials, 8(054411), 054411-1-054411-8, 20240515
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  10. Electronic structure in a rare-earth based nodal-line semimetal candidate PrSbTe, Physical Review Materials (Lett.), 8(L041201), L041201-1-L041201-8, 20240401
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  11. Electronic structure in a transition metal dipnictide TaAs2, J. Phys. Condens. Matter., 36(075502), 1-7, 20231114
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  12. Observation of momentum-dependent charge density wave gap in a layered antiferromagnet GdTe3, Sci. Rep. (Nature), 13(18618), 20231030
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  13. Observation of flat and weakly dispersing bands in the van der Waals semiconductor Nb3Br8 with breathing kagome lattice, Physical Review B (Lett.), 108(L121404), L121404-1-L121404-6, 20230908
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  14. ★, Observation of Fermi arcs and Weyl nodes in a non-centrosymmetric magnetic Weyl semimetal, Physical Review Materials (Lett.), 7(L051202), 20230516
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  15. Observation of gapless nodal-lines in NdSbTe, Physical Review Materials, 7(044202), 044202-1-044202-9, 20230420
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  16. ★, Spectroscopic evidence of flat bands in breathing kagome semiconductor Nb3I8, Communications Materials, 3(100), 1-6, 20221216
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  17. ★, Complex electronic structure evolution of NdSb across the magnetic transition, Physical Review B, 106(235119), 235119-1-235119-6, 20221213
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  18. Observation of anisotropic Dirac cones in the topological material Ti2Te2P, Physical Review B, 106(125124), 125124-1-125124-6, 20220915
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  19. ★, Behavior of gapped and ungapped Dirac cones in the antiferromagnetic topological metal SmBi., Physical Review B, 106(085132), 085132-1-085132-6, 20220823
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  20. ★, Ultrafast relaxation of acoustic and optical phonons in a topological nodal-line semimetal ZrSiS, Communications Physics, 5(203), 1-6, 20220810
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  21. Unusual magnetic and transport properties in HoMn6Sn6 kagome magnet, Physical Review Materials, 6(064404), 064404-1-064404-7, 20220607
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  22. Energy relaxation dynamics in a nodal-line semimetal, Physical Review B, 105(144304), 144304-1-144304-11, 20220407
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  23. Observation of multiple nodal-lines in SmSbTe, Physical Review Materials, 6(L031201), L031201-1-L031201-7, 20220309
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  24. Effect of dilute magnetism in a topological insulator, Frontiers in Materials, 20211125
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  25. Anisotropically large anomalous and topological Hall effect in a kagome magnet, Physical Review B, 104(L161115), L161115-1-L161115-6, 20211026
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  26. Emergence of well-screened states in a superconducting material of the CaFe2As2 family, Physical Review B, 104(094508), 094508-1-094508-6, 20210907
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  27. ★, Evidence of non-trivial Berry phase and Kondo physics in SmBi, Physical Review Materials, 5(054201), 054201-1-054201-7, 20210518
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  28. Evolution of local structure and superconductivity in CaFe2As2, 33(19LT01), 20210421
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  29. Complex hybridization physics in CaFe2As2-a high resolution hard x-ray photoemission study, Journal of Physics: Condensed Matter, 32(33LT01), 33LT01-1-33LT01-6, 20200515
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  30. ★, Ground state anomalies in SmB6, Scientific Reports, 10(1262), 20200127
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  31. Effect of Sm doping on the structural, morphological and dielectric properties of EuFeO3 ceramics, Solid State Sciences, 91, 28-35, 20190309
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  32. ★, Narrow band gap and optical anisotropy in double perovskite oxide Sm2NiMnO6, A new promising solar cell absorber, Solar Energy Materials and Solar Cells, 193, 206-213, 20190110
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  33. ★, Investigation of concentration dependent electrical and photocatalytic properties of Mn doped SmFeO3, Materials Chemistry and Physics, 223, 78-87, 20181018
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  34. Spin- induced transition metal (TM) doped SnO2 a dilute magnetic semiconductor (DMS): A first principles study, Journal of Physics and Chemistry of Solids, 120, 104-108, 20171006
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  35. ★, Origin of the optical anisotropy and the electronic structure of Ru-based double perovskite oxides: DFT and XPS studies, RSC Advances, 7, 43531-43539, 20170908
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  36. Dielectric Relaxation and Ac Conductivity of Halide perovskites CH3NH3PbX3 (X=Br, I), Ferroelectrics, 514, 146-157, 20170920
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  37. Light induced charge transport in La2NiMnO6 based Schottky diode, 727, 238-245, 20170814
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  38. Dielectric relaxation of CH3NH3PbI3 thin film, Thin Solid Films, 638, 277-281, 20170729
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  39. ★, Electronic and optical properties of cubic SrHfO3 at different pressures: A first principles study, Materials Chemistry and Physics, 186, 620-626, 20170115
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  40. Electronic, optical and thermoelectric properties of bulk and surface (001) CuInTe2: A first principles study, Journal of Alloys and Compounds, 699, 1003-1011, 20170105
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  41. Electronic and magnetic properties of X2YZ and XYZ Heusler compounds: A comparative study of density functional theory with different exchange-correlation potentials, Materials Research Express, 3, 075022-1-075022-11, 20160729
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  42. ★, Electronic, optical and thermoelectric properties of PrMO3 (M = Al, Ga, In) from first-principles calculations, RSC Advances, 6, 59988-59997, 20160615
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  43. Band-gap engineering of La1-xNdxAlO3 (x = 0, 0.25, 0.5, 0.75, 1) perovskite using density functional theory: a modified Becke Johnson Potential study, Chinese Physics B, 25, 067101-1-067101-7, 20160420
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  44. Dielectric and impedance spectroscopic studies of Neodymium gallate, Physica B: Condensed Matter, 488, 1-7, 20160209
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  45. Electronic structure, optical dielectric constant and born effective charge of EuAlO3, Journal of Physics and Chemistry of Solids, 88, 1-7, 20150908
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  46. Dielectric Relaxation, Modulus Behaviour and Conduction Mechanism in NdAlO3 Ceramic, Journal of Electronic Materials, 44, 3801-3810, 20150528
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  47. Electronic structure and optical properties of orthorhombic and rhombohedral RAlO3 (R = Sm, Nd),, Solid State Sciences, 42, 37-44, 20150307
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  48. Electronic structure and elastic properties of ATiO3 (A = Ba, Sr, Ca) perovskites: a first principles study, Indian Journal of Pure & Applied Physics, 53, 102-109, 20140925
  49. Dielectric relaxation of samarium aluminate, Applied Physics A: Materials Science and Processing:, 114, 1097-1104, 20130615
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