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 dependencies 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.
D. Belitz et al., "Transport Anomalies and Marginal Fermi-Liquid Effects at a Quantum Critical Point," Physical Review Letters, vol. 85, no. 21, pp. 4602-4605, American Institute of Physics (AIP), Nov 2000.
The definitive version is available at http://dx.doi.org/10.1103/PhysRevLett.85.4602
Keywords and Phrases
Correlation methods; Electric conductivity; Electron tunneling; Mathematical models; Quantum theory; Spatial variables measurement; Transport properties; Marginal-Fermi-liquid effects; Transport anomalies; Ferromagnetic materials
International Standard Serial Number (ISSN)
Article - Journal
© 2000 American Institute of Physics (AIP), All rights reserved.