1. Theoretical condensed matter Physics
Model calculations on transport properties and ground state properties of graphene, ab initio calculations on transport through atomic chains and wire optical properties of small clusters and atomic clusters. Results have been published in journals and presented at various national & international conferences.
The first principles calculations based on density functional theory are used to investigate the electronic, mechanical, optical and vibrational properties of variety of materials both at bulk and nanoscale levels including metal clusters, graphene and graphene like materials, semiconductor wires etc. The pressure or strain dependent studies on materials are interpreted in terms of their applications in nanodevices and seismic waves. These approaches are also being used to understand the interaction between the inorganic and biomolecules for their perspective uses in nanoelectronic devices.
2. Experimental solid state Physics
Experimental solid state Physics works on (a) Crystal growth, Thin film and their characterization (b) Electrical, optical and spectroscopic properties of polymers and their composites, (c) Conduction through ionic conductors, Solid state Ionic Glass materials, NASICON Systems of batteries, Li-Ion polymer nano composite electrolytes, Na-Ion batteries and their radiation effect etc. (d) Photo luminescence studies of nanomaterials for the application of making LEDs. Rare earth doped tungstate nanomaterials were explored for solid state lighting application, Rare earth doped strontiumpyrophosphates have been explored for betairradiated Thermo luminescence Dosimetry. (e) Study of conjugated polymers for low cost electronic and photovoltaic applications (f) Effect of SHI irradiation on polymer nano composites for EMI shielding and gas sources applications and (g) Effect of substitution on multifunctional oxide systems. (h) Research is also being conducted in biomimetics and dynamics of soft materials such as polymers and gels when they are away from equilibrium.
3. Particle Physics
Rare B-meson decays to two pseudoscalar nonets using factorization have been studied and the ranges of several parameters related to B-mesons have been narrowed down. Singlet axial-vector coupling constant of a nucleon has been calculated using QCD sum rules in which correlators of two axial-vector currents between one-nucleon states has been studied. Transition form factors of eta and eta-prime mesons is being investigated taking into account finite meson and quark masses and with few other changed parameters.
(iv) Nuclear Physics: The experimental Nuclear Physics activities are being carried out by using national facilities such as Pelletron of TIFR/BARC, Mumbai and IUAC, New Delhi and Variable Energy Cyclotron (VEC) of Kolkatta. (a) The study of fast neutron induced fission and reaction cross-sections for advanced reactors and Accelerator Driven subcritical systems (ADSS) applications (b) Effect of elastic scattering break up / transfer and reaction cross section with heavy nuclei (c) Study of break up / transfer fusion cross section and elastic scattering cross section with weakly bound stable projectiles (d) Effect of break up on fission/fusion cross section fission anisotropy in 67Li induced reactions with fissile targets, Study of Precise elastic (e) Fission fragments angular and mass distributions of various systems in the medium and heavy nuclei.