Quantum critical behavior near a density-wave instability in an isotropic fermi liquid

Audrey V. Chubukov, Victor M. Galitski, Victor M. Yakovenko

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Abstract

We study the quantum critical behavior in an Isotropic Fermi liquid in the vicinity of a zero-temperature density-wave transition at a finite wave vector qc. We show that, near the transition, the Landau damping of the soft bosonic mode yields a crossover in the fermionic self-energy from ∑(k, ω) ≈ (k) to ∑(k, ω) ≈ (ω), where k and ω are momentum and frequency. Because of this self-generated locality, the fermionic effective mass diverges right at the quantum critical point, not before; i.e., the Fermi liquid survives up to the critical point.

Original languageEnglish (US)
Article number046404
JournalPhysical review letters
Volume94
Issue number4
DOIs
StatePublished - Feb 4 2005

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