Condensed Matter Theory/Quantum Theory
Steven G. Louie, Program Leader
This is a broad-based program to understand and
compute material properties and behaviors involving three principal
investigators and covering two complementary efforts:
1) quantum theory of materials, and
2) strongly correlated electron systems.
Novel materials and new concepts are explored. A variety of theoretical
techniques is employed, ranging from first-principles electronic
structure calculations to new conceptual and computational frameworks
suitable for complex materials/nanostructures and strongly interacting
electron systems. One focus is to investigate realistic systems
employing microscopic, first-principles approaches. Model systems
are also examined. Studies include bulk materials, nanostructures,
superconductors, surfaces and interfaces, and reduced-dimensional
systems. Close collaboration with experimentalists is maintained.
Another emphasis is to push the frontier of theory beyond the Landau
paradigm toward a framework capable of describing and predicting
the behavior of strongly correlated systems. Through interaction
with experiment, new phases, new phase transitions, and new organization
principles may be discovered. Equally important is the development
of computational methods suitable for increasingly complex materials
and strongly correlated materials.
CURRENT PROJECTS
Quantum Theory of Materials (M.
L. Cohen and S.
G. Louie)
Formalism and calculations for electronic and structural properties
of solids
Superconductivity and electron-phonon interactions
Quasiparticle excitations and optical response of solids and nanostructures
Electron transport through nanostructures
Strongly Correlated Electron Systems (D.-H.
Lee )
Bose condensation of spin-charge separated defects in topological
insulators
Quenching of Rabi oscillation in an ohmic environment
Checkerboard-like spin texture in a spin-1 Bose condensate
Renormalization group study of possible electronically-induced
superconducting pairing in MO1-xFxFeAs
Persistent low temperature flux noise in a SQUID
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