Condensed Matter Theory Seminar

Note Special Time and Place!
10:30 a.m., Wednesday, March 3, 2004
Room 2202, Physics Building

Relevance of Clustered States in Diluted Magnetic Semiconductors and Other Materials

Gonzalo Alvarez

(Florida State University)

Abstract: We have numerically studied several models for materials of much current interest in condensed matter physics, using unbiased methods including Monte Carlo simulations and exact treatment of the fermionic trace at finite temperature. We have found that many of these materials share common phenomenological aspects due to the presence of intrinsic inhomogeneities in the form of "clustered states". Some of these states are highly susceptible to external perturbations. The list includes diluted magnetic semiconductors, colossal magnetoresistance manganites and high temperature superconducting cuprates. I will also discuss experimental evidence and other theoretical approaches that support the key role of inhomogeneities in these materials.

Host: Das Sarma
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