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

2001-08-07

arxiv.org/abs/cond-mat/0108118v1

in "Advances in Quantum Many-Body Theory, Vol. 6, Raymond F. Bishop et al. (eds.), World Scientific (Singapore 2002)

Physics

Condensed Matter

Statistical Mechanics

4 pp., LaTeX, no figs., requires World Scientific style files (included), Contribution to MB11

Scientific paper

The behavior of the conductivity and the density of states, as well as the phase relaxation time, of disordered itinerant electrons across a quantum ferromagnetic transition is discussed. It is shown that critical fluctuations lead to anomalies in the temperature and energy dependence of the conductivity and the tunneling density of states, respectively, that are stronger than the usual weak-localization anomalies in a disordered Fermi liquid. This can be used as an experimental probe of the quantum critical behavior. The energy dependence of the phase relaxation time at criticality is shown to be that of a marginal Fermi liquid.

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