Speaker : Dr. Vincent Sacksteder Asia-Pacific Center for Theoretical Physics (APCTP)Pohang, Korea
Date : 2009-06-18 16:00
Venue :
ITP New Building 6620, 理论物理研究所新楼六层报告厅
Abstract : In disordered materials conduction corresponds to spontaneous
symmetry breaking (SSB) and Anderson localization corresponds
to the absence of SSB. The Mermin-Wagner theorem accounts for
the fact that weakly disordered materials are localized in D = 1,2
dimensions and conduct otherwise. I describe a separate mechanism
which is important whenever the disorder is not weak and is
responsible for localization in D > 2 dimensions. This work
is based on recently developed field theories which are exactly
equivalent to the Wegner model and to an easier variant.
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