Dr. Rajyavardhan Ray

Contact Us

Email - r.ray@bitmesra.ac.in

Research Interests and Activities

Research Interests: correlated and spin-orbit coupled systems

Condensed Matter Theory with focus on electronic, optical and magnetic properties of materials, via density functional theory calculations, tight binding models and (classical) Monte Carlo simulations, especially correlated and spin-orbit coupled systems, and low-dimensional and frustrated magnets.

Current Research Focus

My current research focus is in materials with large bulk photovoltaic effect, electronic and magnetic properties of putative Kitaev magnets, and topological quantum materials.

Presently engaged in studying a variety of spin-orbit coupled materials, including but not limited to Weyl semimetals, antiferromagnetic topological insulators, and Kitaev-Heisenberg magnets, and different aspects of molecular magnets.

Expertise: Density Functional Theory (DFT) [FPLO and WIEN2k codes], (classical) Monte Carlo simulations, effective Hamiltonian techniques, many-body techniques like mean field analysis, diagrammatics (Green's functions), spin-fluctuation approach, renormalization group, quantum transport (using Kubo-Greenwood formula).

Areas of Interest: Theoretical Condensed Matter Physics, Strongly Correlated Systems, Many-body Quantum Field Theory, Machine Learning, Game Theory .

Research Profile(s): Google Scholar ResearchGate

A complete list of publications is also available on arXiv.

 

List of Invited Talks / Talks

2023: Leibniz Institute for Solid state and Materials Research (IFW) Dresden, Germany [Invited Talk]
Discovery and observation of topological nontrivial Dirac cones in Na2IrO3.

2023: Tata Institute of Fundamental Research (TIFR), Mumbai, India [Invited Talk]
Kitaev-Heisenberg magnets.

2022: DST-Stuti One-week Hands-on Trainging Workshop on ‘Nanostructured Materials and Devices: Fabrication, Characterization and Applications’ (NMD-2022), BIT Mesra, Ranchi, India [Invited Talk]
Surface spectral properties of selected topological quantum materials.

2020: APS March Meeting 2020, Denver, Colorado, USA
Large off-diagonal exchange coupling driven magnetic anisotropy and spin liquid states in the C3-symmetric iridate K2IrO3.

2020: Indian Institute of Science Education & Research (IISER) Mohali, Punjab, India [Invited Talk]
Electronic properties of pristine and strained Sr2IrO4.

2020: SFB Winter Workshop 2020, TU Dresden [Invited Talk]
Recently synthesized honeycomb lattice Mott insulators: Electronic structure and magnetic phase diagrams.

2019: Indian Institute of Technology (IIT) Kharagpur, West Bengal, India [Invited Talk]
Doped single molecule magnets: Perspectives & possibilities

2018: Kavli Institute of Nanoscience, TU Delft, Netherlands [Invited Talk]
Doped rare-earth single molecule magnets.

2017: FPLO Workshop on "Spin-orbit effects in molecules and solids: diversity of properties and computational precision", Max-Plank Institute for Chemical Physics of Solids (MPI-CPfS) [Invited Talk]
Orbital magnetism in neutral and ionized Co dimers.

2017: Bose Institute, Kolkata, India [Invited Talk]
Lanthanide-based doped molecular magnets: A density functional theory perspective.

2017: Recent Trends in Condensed Matter Physics (RTCMP), Kolkata, India
Investigations into the spin interactions and multiplet spectrum of the single molecule magnets Ln2@C80.