ANUP PRADHAN SAKHYA

Last Updated :2026/05/08

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. ★, Evidence of non-trivial Berry phase and Kondo physics in SmBi, Physical Review Materials, 5(054201), 054201-1-054201-7, 20210518
    Link to Paper Search Results by DOIRepository URL
  2. Observation of multiple nodal-lines in SmSbTe, Physical Review Materials, 6(L031201), L031201-1-L031201-7, 20220309
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  3. ★, Spectroscopic evidence of flat bands in breathing kagome semiconductor Nb3I8, Communications Materials, 3(100), 1-6, 20221216
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  4. Energy relaxation dynamics in a nodal-line semimetal, Physical Review B, 105(144304), 144304-1-144304-11, 20220407
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  5. Unusual magnetic and transport properties in HoMn6Sn6 kagome magnet, Physical Review Materials, 6(064404), 064404-1-064404-7, 20220607
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  6. ★, 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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  7. ★, 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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  8. Observation of anisotropic Dirac cones in the topological material Ti2Te2P, Physical Review B, 106(125124), 125124-1-125124-6, 20220915
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  9. ★, Complex electronic structure evolution of NdSb across the magnetic transition, Physical Review B, 106(235119), 235119-1-235119-6, 20221213
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  10. ★, 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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  11. Observation of gapless nodal-lines in NdSbTe, Physical Review Materials, 7(044202), 044202-1-044202-9, 20230420
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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. 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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  15. Observation of paramagnetic spin-degeneracy lifting in the EuZn2Sb2, Physical Review B, 110(045130), 045130-1-045130-6, 20240716
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  16. 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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  17. Electronic structure in a transition metal dipnictide TaAs2, J. Phys. Condens. Matter., 36(075502), 1-7, 20231114
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  18. Complex Fermiology and Electronic Structure of Antiferromagnet EuSnP, Physical Review Materials, 8(054411), 054411-1-054411-8, 20240515
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  19. ★, Diverse electronic landscape of the novel kagome metal YbTi3Bi4, Communications Materials, 5(241), 1-7, 20241103
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  20. ★, Spin density wave and van Hove singularity in the kagome metal CeTi3Bi4, Nature Communications, 16(4384), 1-9, 20250512
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  21. Electronic structure of a nodal line semimetal candidate TbSbTe, Physical Review Materials (Lett.), 9(9), 064202-1-064202-11, 20250605
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  22. 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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  23. ★, Diverse electronic topography in a distorted kagome metal LaTi3Bi4, Physical Review Materials (Lett.), 9(L111201), L111201-1-L111201-6, 20251117
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