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TT: Tiefe Temperaturen

TT 22: Metall-Isolator-Überg
änge in Quantensystemen II

TT 22.2: Vortrag

Freitag, 28. März 2003, 10:30–10:45, HSZ301

Mean field theory of an itinerant spin glass — •Michael Bechmann and Reinhold Oppermann — Institut für Theoretische Physik, Universität Würzburg, D-97074 Würzburg

We introduce a model of a fermionic spin glass with infinite-range magnetic interactions and nearest neighbor fermion hopping on a lattice with infinite spatial dimensionality.

We derive replica-symmetric self-consistency equations for the spin glass order parameters and present numerical solutions in the static approximation both at finite temperatures and at T=0. Finally, we discuss quantum-dynamical corrections to the static phase diagram.