Theoretical Condensed Matter Physics

Don Ellis  {Ellis Research Group}
Professor Ellis' group studies the electronic structure and related materials properties of ceramics, polymers, alloys, molecular assemblies, and nanostructures. A hybrid classical/quantum mechanical approach is used to explore transport, spectra, energetics, electrical and magnetic response. Recent developments include an order(N) linear-scaling method for treating extended systems with low symmetry, using parallel-computational algorithms.

Arthur Freeman
Professor Freeman's research centers on the numerical calculation of the properties of materials. His research group has developed a method of calculating magneto-optical effects in solids and surfaces and has developed a new approach for determining magneto-crystalline anisotropy. Other materials that his group has investigated include high-Tc superconductors, magnetic overlayers and multilayers, and semiconductor heterostructures.

Anupam Garg
Professor Garg studies quantum phenomena involving the orientation of spin angular momentum, especially in single molecule nanomagnets, where the spin is observed to tunnel through as much as twenty quanta. He also investigates how Feynman's path integral viewpoint can be adapted to the spin coherent state path integral to yield practical semiclassical methods for spin.

Olle Heinonen
The behavior of magnetization in nanoscale structures is a rich field with important applications in information storage. In these systems, the interactions between different layers as well as between different structures in patterned arrays can be tuned. This leads to an interplay between interactions, resulting in complex static and dynamic magnetization behavior. Furthermore, charge currents in non-collinear magnetic structure can couple to magnetization dynamics through spin torque, leading to complex dynamical behavior, including GHz nano-scale oscillators. Prof. Heinonen's research in this area is aimed at understanding how behavior arises and can be controlled by tailoring interactions and structures.

Jens Koch
Professor Koch's group works on several topics in theoretical condensed matter physics, including strongly correlated systems, quantum information processing with solid-state devices and theory of quantum transport.

James A. Sauls
Theoretical condensed matter research involves the discovery of concepts related to the collective behavior of enormous numbers of atomic constituents, combined with the application of statistical mechanics and quantum theory to describe the behavior of macroscopic matter.  Prof. Sauls conducts theoretical studies of matter in which quantum effects are manifest in the observable properties of matter.  Current research projects include magneto-acoustics in quantum fluids and solids, broken symmetry and phase transitions in confined quantum fluids, theories of Fermi systems with correlated disorder and spin and charge transport in superconducting-ferromagnetic devices.

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August 26, 2013