Absence of spin diffusion in most random lattices

R. N. Bhatt, Daniel S. Fisher

Research output: Contribution to journalArticle

136 Scopus citations

Abstract

We examine the metallic phase of the positionally disordered Anderson-Hubbard model as a prototype of a strongly correlated disordered metal. We find that the low-temperature thermodynamics is dominated by spin excitations in rare regions, leading to non-Fermi-liquid behavior as T0 with a diverging susceptibility, a specific heat rising faster than T, and a vanishing spin diffusion coefficient. We argue that the results should, in principle, apply throughout the metallic phase of random alloys which undergo a transition, as a function of concentration, to an insulating phase with local moments.

Original languageEnglish (US)
Pages (from-to)3072-3075
Number of pages4
JournalPhysical review letters
Volume68
Issue number20
DOIs
StatePublished - Jan 1 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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