Research Interests: My main area of interest lies in the physics of strongly correlated electronic materials which include many nanostructures, high T_c superconductors, and heavy Fermion and magnetic materials. These materials are characterized by one or more of the following phenomena: competing phases such as a Mott-Hubbard, Mott or Anderson insulators, magnetism, superconductivity, non-Fermi liquid phases, quantum criticality where the transition temperature of one or more of these phases vanishes. In general, exact solutions of models of these systems are not possible, and attempts to use uncontrolled analytic techniques have met with limited success. However, in addition to the usual many-body techniques, I have developed techniques which separate the problem into strongly interacting and weakly interacting parts. The weakly interacting parts are treated with either perturbation theory or mean-field approaches, and then integrated out of the action. The remaining strongly interacting part of the action may be mapped to a small effective cluster problem which is treated with Quantum Monte Carlo (QMC) or other non-perturbative approaches. I have also developed methods used to analytically continue QMC imaginary time results to real frequencies. This allows QMC simulations to address experiments such as reflectivity, photoemission, inelastic neutron scattering and transport. Finally, I am interested in high-throughput methods which enable the computer to search for interesting material's properties that may be validated experimentally. For more information, please see the links below:

For more information about my research:

• A brief introduction to strongly correlated systems.

• Publication List (most papers are available in electronic form).

• A hyperlinked discussion of my research.

• My Vita.

• My Google Scholar Page.

Other Research Related Links:

• Los Alamos Preprint Archive.

• Physical Review journals online.

• Wilkins' List of Online Journals and Databases.

• ISI Web of Science database.

• Purdue Online Writing Lab.

• English Communication for Scientists

Useful Guides, HowTo's, Templates, etc.:

• Linux and Compuational links (or click on the penguin above).

• John Wilkins' Onepagers (guides for writing, speaking...).

• Wilkins' Other Links.

• Templates and guides for writing papers with RevTex4.

• Grammar Girl.

Previous Students:

• Hossein Akhlaghpour, 1990-1995, Thesis: Paper Only, Position: System Developer, Anthem Corp.

• Woonki Chung , 1991-1996, Thesis: Quantum Monte Carlo Study of Electron Correlation Effects in Superconductors , Position: System Administrator, Georgetown University Dept. of Physics.

• Amitava (Amit) Chattopadhyay 1993-1998, Thesis: Non-Fermi-Liquid Ground States in Certain Heavy Fermion Systems, Position: Research Scientist, IBM Almaden.

• Alireza Tahvildarzadeh 1993-1998, Thesis: A Numerical Study of Strongly Correlated Electron Systems, Position: Postdoc, Georgetown University.

• N.S. Vidhyadhiraja, Shared with H.R. Krishnamurthy, Professor, JNC, Bangalore.

• Thomas Maier (shared with Th. Pruschke) 1996-2000, Thesis: Non-Local Dynamical Correlations in Strongly Interacting Fermion Systems, Position: Wigner Fellow, Oak Ridge National Labs.

• Karan Aryanpour 1999-2003, Thesis: Approximation Techniques in Strongly Correlated Electron Systems, Position: Postdoc at University of California, Davis.

• Muhammad Aziz Majid (shared with J. Moreno), 1999-2006, Thesis: Computational Studies of Ferromagnetism in Strongly Correlated Electronic Systems, Position: postdoc Univ. of North Dakota.

• D. G. S. P. Doluweera, 2008, Thesis: Effect of Weak Inhomogeneities in High Temperature Superconductivity,Position: postdoc at Georgia State University.

• B.Q. Cao (shared with J. Meller), Thesis: On Applications of Statistical Learning to Biophysics, Postdoc at Postdoc at U. of Nebraska.

• Cyrill Slezak (shared with R. Endorf), 2001-2006, Thesis: Methods for Correlated Electron Systems Assistant Professor at Utah Valley University.

• Majid Nili (shared with Juana Moreno), 20??-2010, Thesis: Ferromagnetism and Transport in Diluted Magnetic Semiconductors, Postdoc at Penn State.

• Herbert Fotso 2005-2011, Thesis: Two-Particle Level Diagrammatic Approaches for Strongly Correlated Systems, Assistant Professor. University of Albany.

• Karlis Mikelsons (shared with J. Moreno), 2009, Thesis: Extensions of Numerical Methods for Strongly Correlated Electron Systems,

• Ehsan Khatami (shared with J. Moreno), 2009, Thesis: Criticality and Superconductivity in the Two-dimensional Hubbard Model of Strongly Correlated Electronic Systems,

• Peng Zhang ,Thesis: Numerical Investigations of Holstein phonons on the periodic Anderson Model, Position: Professor Xi'An Jiaotong University

• Peter Reis (shared with J. Moreno), Thesis: Magnetic Compensation in the Bimetallic Oxalates and the Cerium Volume Collapse.

• Kuang-Shing Chen (shared with J. Moreno), Thesis: Quantum Simulations on Square and Triangular Hubbard Models.

• Chinedu Ekuma (shared with J. Moreno), Thesis: Towards the Realization of Systematic, Self-Consistent Typical Medium Theory for Interacting Disordered Systems

• Ryky Nelson (shared with J. Moreno), Thesis: First-Principles and Many-Body Methods: Implementations and Applications to Study Spintronic Materials

• Kalani Hettiarachchilage (shared with J. Moreno), Thesis: Strongly correlated ultra-cold bosonic atoms in optical lattices

• Patrick Haase (shared with Thomas Pruschke), Thesis: Dual Fermion Approach to Disordered Correlated Systems.

• Nagamalleswararao Dasari (shared with Vidhyadhiraja Sudhindra), Thesis: Development and application of computational quantum many-body methods for strongly correlated models and materials

• Sheng Feng, Thesis: Study of Condensed Matter Systems with Monte Carlo Simulation on Heterogeneous Computing Systems

• Yun (Eric) Ding (Shared with M. Brylinski) Thesis: Data-Driven Rational Drug Design.

• Sudeshna Sen (shared with Vidhyadhiraja Sudhindra), Thesis: Emergent phenomena in spatially and energetically inhomogeneous strongly correlated model electron systems.

• Wasim Raja Mondal (shared with Vidhyadhiraja Sudhindra)

Previous Postdocs:

• Hanbin Pang, Lead Software Developer, CenturyLink.

• Matthias Hettler. Institut fuer Nanotechnologie, Karlsruhe, Germany.

• William Putikka. Assoc. Prof., The Ohio State University (Mansfield).

• Samuel Moukouri. Senior Researcher in Physics at Ben Gurion University

• Thomas Maier, Oak Ridge National Laboratory.

• Carey Huscroft, Hewlett Packard.

• Juana Moreno, Associate Professor, LSU.

• Brian Moritz, SLAC research staff.

• Paul Kent, ORNL/UT JINCS.

• Unjong Yu, Assistant Professor, GIST-college

• Dimitris Galanakis, World Traveler

• Alex Macridin, FermiLab Research Staff.

• Zi Yang Meng, Associate Professor at Institute of Physics, Chinese Academy of Sciences

• Valy Rousseau, Assistant Prof., Loyola University

• Hanna Terletska, Postdoc University of Michigan (E. Gull Group)

• Shuxiang Yang,

Present Research Group:

• Students: Conrad Moore, Samuel Kellar, Enzhi Li

• Postdocs: Ka Ming Tam, Yi Zhang

• Senior Collaborators: Vidhyadhiraja Sudhindra, Tom Berlijn, Wei Ku, Liviu Chioncel, Michal Brylinski.

Teaching Interests: During the development of a graduate course in classical electrodynamics I became heavily involved in the use of computers in graduate education. I find that my students can use computer to solve more realistic homework problems, visualize their answers, and reduce the algebraic tedium. The computer also allows me to distribute the related courseware, and provide more realistic classroom demonstrations in the various electronic classrooms on campus. Two courses are being developed in this way. Please see the links below for more information.

Provide Website Feedback
Accessibility Statement