-
Birth Date:
6 January 1950.
- Academic
- M. Sc. 1971.
- Ph. D. 1976.
- Title of Ph. D. Thesis
Band Structure Calculations of Electron
Momentum Density in Some Transition Metals, (I. I. T., Kanpur).
- Employment .
- Present Position:
- Professor of Physics (1993), University of Pune, India.
- Details of appointment/promotion etc. in the Dept.:
- Lecturer (1978).
- Reader (1985).
- Post-doctoral and other visiting assignments:
- With Prof. J. Callaway at Louisiana State University: Jan-Dec 1981,
Feb-May 1983.
- 3 months summer visits: several times between 1984-1992.
- Queen's University, Kingston, Canada: May -Aug 1984.
- ICTP, Trieste: 1987, 1990, 1992, 1994.
- Awards and Honours :
- Career Award UGC 1981.
- ICTP Associate Member (1990-97).
- Main field of specialization:
- Condensed Matter Physics.
- Research publications in the international Refereed Journals:
56.
- Other fields of interest:
- Computational Physics, Parallel Processing Applications.
- Reviewer/Referee:
Phys. Rev. B., Pramana.
- Number of M. Phil. and Ph. D.'s supervised:
- M. Phil. : 2.
- Ph. D. : 4.
Number of Ph. D. students presently working: 4.
- Teaching Experience:
- About 20 years of teaching experience at M. Sc. level.
- Special interest:
- Computational Physics.
Development of computational lab at junior and senior
level; to expose students to modern computing techniques:
- Monte Carlo Methods--Ising model
- Basic electronic Structure
- Numerical Methods
- Cluster Simulations, etc.
- Other Academic Responsibilities:
- Joint co-ordinator of interdisciplinary school for scientific computing;
Director, Centre for Network Computing.
- Research Profile
Density Functional Theory--Applications
Extensive work on electronic band structure on transition
metals with a view to understand experimentally measured electron
momentum density and Two photon momentum density
ie positron annihilation using APW, LCGO method.
The exchange correlation potentials required for LD
calculations are calculated for interacting electron gas.
- Simple Model--Atoms in Jellium
A simple physically appealing model for impurity in
simple metal.
- Applications to:
- Core level Binding energies
- Auger Energies,
- Total energy calculations of simple solids ,
- Residual resistivity, etc.
- Other Investigations:
Positron binding to atoms and negative ions,two component
density functional generalization to electron positron system
motivated by development of low energy positron beams.
F-center Positron complex: $e-p$ bound state in the presence of
$Z/r$ potential using explicitly correlated functions,
Generator-Coordinate method.
- Model Hamiltonian Clusters, Strongly Correlated Systems:
Extensive calculations using exact diagonalization method have
been performed with a view to understand the nature of the heavy
Fermion systems on Anderson Model.
- The Hubbard and $t-J$ models have been investigated and some of
the issues of current interest are:
- Nature of the Normal state
- Spin charge separation--Nature of excitations
- Non Fermi Liquid behavior
- Interlayer Tunneling mechanism
- Scaler and magnetic imputity in strongly correlated 1D systems.
- Ab initio Molecular Dynamics:
State of the art Computational Physics Problem; Physics of clusters;
A state of the art program to carry out
complete Car Parrinello simulated annealing
strategy and global minimization ( Conjugate Gradient method)
along with ab initio
molecular dynamics has been developed in our laboratory. A fast version
based on 'density only' is capable of treating a few hundred
atom system.
- The applications include :
- Ground state geometries of
Li/Al binary clusters, Melting studies on Al13 and interaction of
small clusters on Surfaces.
- A parallel version on PARAM 9000 has also been developed.
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