Localization and correlation effects in itinerant ferromagnets

Avinash Singh, Eduardo Fradkin

Research output: Contribution to journalArticlepeer-review

Abstract

The effects of disorder, in particular of localization, have been studied in the vicinity of the ferromagnetic transition by making use of a generalized N-orbital model within a 1/N expansion technique. Fermi-liquid behavior is obtained in the N limit with two separate diffusion constants for spin- and charge-density fluctuations. The spin-diffusion constant associated with spin fluctuations and Stoner excitations is found to acquire a localization correction. While the dc conductivity in the ferromagnetic phase also acquires the same localization correction, the spin-wave stiffness constant does not. This indicates the system can exist in an insulating state and exhibit long-range magnetic order a ferromagnetic Anderson insulating state.

Original languageEnglish (US)
Pages (from-to)6894-6901
Number of pages8
JournalPhysical Review B
Volume35
Issue number13
DOIs
StatePublished - Jan 1 1987

ASJC Scopus subject areas

  • Condensed Matter Physics

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