Condensed Matter Physics Seminar

2 p.m., Thursday, April 8, 2004
Room 1201, Physics Building

 Can superconductivity emerge out of a non-Fermi liquid?

Andrey Chubukov

 (University of Wisconsin)

Abstract:  I present our current understanding of the non-Fermi liquid and pseudogap physics within the magnetic scenario for the cuprates. I argue that near a magnetic quantum critical point (QCP), the theoretical description necessary falls into the strong coupling regime, and the pairing predominantly involves non-Fermi liquid quasiparticles. I further argue that the pairing of incoherent fermions leads to the reduction of the fermionic density of states at low energies, but a true superconductivity requires a Fermi liquid behavior and emerges only at a temperature which near QCP is well below the gap opening temperature. I present the emerging phase diagram and discuss suggestions for experimental verifications.
Host:  Yakovenko
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