Quantum critical behavior near a density-wave instability in an isotropic fermi liquid |
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Authors: | Chubukov Andrey V Galitski Victor M Yakovenko Victor M |
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Institution: | Department of Physics, University of Wisconsin, Madison, WI 53706, USA. |
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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 Sigma(k,omega) approximately Sigma(k) to Sigma(k,omega) approximately Sigma(omega), where k and omega 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. |
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