Spin fluctuations in disordered interacting electrons

C. Castellani; C. di Castro; P. A. Lee; M. Ma; S. Sorella; E. Tabet

doi:10.1103/PhysRevB.30.1596

Rapid Communication

Spin fluctuations in disordered interacting electrons

C. Castellani, C. di Castro, P. A. Lee, M. Ma, S. Sorella, and E. Tabet

Phys. Rev. B 30, 1596(R) – Published 1 August 1984

Abstract

The recent solution by Finkel'shtein of a model of two-dimensional interacting disordered electrons is reconsidered. The scaling equation requires a small modification, with the result that the conductivity remains finite down to zero temperature instead of going to infinity as envisaged by Finkel'shtein. Strong divergence in the spin susceptibility and a vanishing of the spin-diffusion constant are found at low temperatures. We also discuss the possibility that the spin fluctuation may lead to crossover to the high magnetic field or singlet-only universality classes, restoring the metal-insulator transition.

Received 11 May 1984

DOI:https://doi.org/10.1103/PhysRevB.30.1596

Authors & Affiliations

C. Castellani

Istituto di Fisica "G. Marconi," Università degli Studi di Roma, I-00185 Roma, Italy and Istituto di Fisica, Università degli Studi dell'Aquilla, I-67100 l'Aquilla, Italy

C. di Castro