Condensed Matter Physics Seminar

2 p.m., Thursday, February 22, 2001
Room 1201, Physics Building

 2D fermions near an antiferromagnetic instability: non-Fermi-liquid behavior and pairing

Andrei Chubukov

(Department of Physics, University of Wisconsin, Madison)

Abstract:  In this talk, I will consider the properties of 2D fermions near the boundary of the antiferromagnetic phase.  This problem is relevant to both cuprates and heavy fermion materials.  I focus on the situation when spin decay is allowed, i.e., at a mean-field level, the magnetic transition has a dynamical exponent z=2.  For this problem, the RG consideration yields a marginal behavior at criticality.  I show, however, that the actual situation is more complex due to the presence of anomalies, hidden from RG treatment.  I argue that I discuss the meaning of these results for cuprates.

Host: Victor Yakovenko

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