The disordered Fermi-liquid fixed point and its instabilities

Details The disordered Fermi-liquid fixed point and its instabilities The disordered Fermi-liquid fixed point and its instabilities

1999-07-25

arxiv.org/abs/cond-mat/9907383v2

Ann. Phys. (Leipzig) vol. 8, pp. 765-774 (1999)

Physics

Condensed Matter

Statistical Mechanics

10 pp., LaTeX, no figs., requires annalen.cls (included), Invited contribution to Localisation 99, final version as published

Scientific paper

10.1002/(SICI)1521-3889(199911)8

The concept of a disordered Fermi-liquid fixed point is introduced and used to understand various properties of disordered metals within a unifying framework. Corrections to scaling near this fixed point give what are commonly called weak-localization effects. Various instabilities of the disordered Fermi-liquid phase are discussed. These include two distinct types of superconducting-to-normal-metal quantum phase transitions. First, the quantum phase transition from a disordered metal to a conventional superconductor in bulk materials is considered. Second, a quantum phase transition in two dimensions from metallic-like behavior to a novel type of disorder induced, spin-triplet, even parity, superconductivity is treated. The paper is concluded with a discussion of the nature of the ground state of two-dimensional, disordered electron systems.

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