Embedded Files
Electronic structure of Quantum Materials
Electronic structure of Quantum Materials
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.
(See Publications for details).
Current Position: Assistant Professor (Tenure Track)
(November 2025 - present)
Research Institute for Synchrotron Radiation Science, Hiroshima University.
Kagamiyama 2-313, Higashi-Hiroshima 739-0046, JAPAN
About me
About me
Postdoctoral Research Fellow at the University of Central Florida, USA (March 2021-July 2025)
Postdoctoral Research Fellow at the Tata Institute of Fundamental Research (TIFR), Mumbai, India (April 2017- October 2020)
Ph.D. Bose Institute, Kolkata, India (September 2011-February 2017)
Research Interests:
Topological insulators, Topological nodal-line semimetals, Weyl semimetals, Dirac semimetals.
Non-equilibrium relaxation dynamics of topological materials.
Correlated electron systems-Kondo insulators, Kagome based materials, 4f/5f based materials.
Quantum oscillation studies of topological materials.
Electronic structure and Dielectric relaxation studies of rare-earth based Perovskite oxides.
Density functional theory.
Expertise:
Photoemission spectroscopy (PES) techniques such as Angle-resolved PES, Time-resolved angle-resolved PES, X-ray PES, Ultraviolet PES, Hard X-ray PES.
First principles calculations using VASP (Vienna ab-initio simulation package) and Wien2K (FP-LAPW) method.
An Overview of User Facilities at the Research Institute for Synchrotron Radiation Science , Hiroshima University, Japan
Page updated
Google Sites
Report abuse