Transport Anomalies and Marginal Fermi-Liquid Effects at a Quantum Critical Point

Details Transport Anomalies and Marginal Fermi-Liquid Effects at a Quantum Critical Point Transport Anomalies and Marginal Fermi-Liquid Effects at a Quantum Critical Point

2000-08-29

arxiv.org/abs/cond-mat/0008431v2

Phys. Rev. Lett. 85, 4602 (2000)

Physics

Condensed Matter

Statistical Mechanics

4pp., REVTeX, no figs, final version as published

Scientific paper

10.1103/PhysRevLett.85.4602

The conductivity and the tunneling density of states of disordered itinerant electrons in the vicinity of a ferromagnetic transition at low temperature are discussed. Critical fluctuations lead to nonanalytic frequency and temperature dependences that are distinct from the usual long-time tail effects in a disordered Fermi liquid. The crossover between these two types of behavior is proposed as an experimental check of recent theories of the quantum ferromagnetic critical behavior. In addition, the quasiparticle properties at criticality are shown to be those of a marginal Fermi liquid.

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