Quantum critical behavior near a density-wave instability in an isotropic Fermi liquid
arXiv:cond-mat/0405344 · doi:10.1103/PhysRevLett.94.046404
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 q_c. 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) ~ Sigma(k) to Sigma(k,omega) ~ 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.
4 pages, 1 figures, REVTeX 4; v.2 - as published in PRL
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- Self-generated locality near a ferromagnetic quantum-critical point
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- Two Scenarios of the Quantum Critical Point
- Metallic phase in a two-dimensional disordered Fermi system with singular interactions
- Toward a topological scenario for high-temperature superconductivity of copper oxides
- Fermi liquid behaviour in weakly disordered metals close to a quantum critical point