Prof. Ray’s research interest in the broad area of experimental condensed matter physics focusses on semiconductor nanostructures, epitaxial growth of quantum structures, nanophotonics and physics of nanodevices. His research has run the gamut from very practical fields such as pseudomorphic strained SiGe/SiGeC alloy heterostructures for high mobility MOSFETs to low dimensional quantum structures. His studies on Ge quantum dots and strained Ge to achieve light emission from an indirect bandgap semiconductor are useful to realize Si based lasers in future. His research results on floating-gate flash memory, quantum dot infrared photodetectors and nanowire heterojunctions are considered as significant breakthroughs for future nanodevice applications. Prof. Ray has supervised twenty three Ph.D. students (another twelve continuing at IIT Kharagpur) and more than fifty dissertations in UG and PG levels. He has completed 16 sponsored research projects worth over Rs. 18 crore as a PI/Co-PI.
My Theoretical research areas in Magnetism, Superconductivity, Strongly Correlated Electronic Systems, Quantum Many –Body Physics, Quantum Field Theory- Condensed Matter Physics Interface, Molecular Bio-Physics
My main research areas in Study of electronic properties of strongly correlated low dimensional systems, Developing and implementing numerical methods including DMRG methods, exact diagonalization and quantum Monte Carlo methods for solving strogly correlated model Hamiltonians, Transport properties of metal-organic and organic-organic interfaces, Study of electronic potential energy surfaces in biological systems.