Condensed Matter Physics Seminar

2 p.m., Thursday, November 20, 2003
Room 1201, Physics Building

Singular corrections to a Fermi liquid: 1D physics in D>1

Andrey Chubukov

(University of Wisconsin)

Abstract: I show that the singularities in the dynamical bosonic response functions of a generic Fermi liquid give rise to universal, non-analytic corrections to the Fermi-liquid theory. In D=2, these corrections yield a T² term in the specific heat, and linear in T terms in the effective mass and the uniform spin susceptibility. I will argue that these singular terms come from two 1D interaction processes with transferred momenta either zero or 2p_F, and zero total momenta. I will also argue that singular corrections to the uniform pin susceptibility invalidate conventional theories of a ferromagnetic transition in itinerant electron systems.

Host: Yakovenko
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