Non-Fermi-liquid behavior in itinerant antiferromagnets

I. Vekhter, A. V. Chubukov

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Abstract

A two-dimensional itinerant antiferromagnet near quantum critical point was investigated for non-fermi-liquid (NFL) behavior. At a QCP, the fluctuation of the order parameter (OP) are gapless, and the effective electron-electron interaction mediated by this bosonic mode is long ranged. The NFL behavior originates from the interaction between the electrons and longitudinal bosonic excitations. It was observed that the NFL electron behavior emerges on the ordered side of a QCP when Q ≠ 0.

Original languageEnglish (US)
Article number016405
Pages (from-to)016405-1-016405-4
JournalPhysical review letters
Volume93
Issue number1
DOIs
StatePublished - Jul 2 2004

Bibliographical note

Funding Information:
We are grateful to Aspen Center for Physics for its hospitality. This work was supported by the U.S. DOE (I. V.) and by NSF DMR 0240238 (A. C.). We thank ?>E. Abrahams, I. Aleiner, Ar. Abanov, D. Morr, D. Pines, D. Scalapino, and J. Schmalian for useful conversations.

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