Critical properties of metal-insulator transition in low dimensions

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Anomalous metallic states near the Mott insulator are analyzed in terms of the critical scaling toward the metal-insulator transition. Continuous transitions from a metal to the Mott insulator are characterized either by the mass divergence as in the bi-component systems or the vanishing carrier number as in the valence bond systems. A set of critical exponents in these two cases is deduced from the scaling theory. The correlation exponent v and the dynamical exponent z satisfy v = 1/2 d and z = 2 d when the mass diverges in d dimensions, while v = 1/2 and z = 2 if the carrier number vanishes. Crossovers between quantum critical regime and thermal critical regime inferred from this theory shed light on understanding experimental indications in high-Tc cuprates and other strongly correlated systems.

Original languageEnglish
Pages (from-to)437-442
Number of pages6
JournalJournal of Low Temperature Physics
Volume99
Issue number3-4
DOIs
Publication statusPublished - 1995 May 1
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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