Disorder induced cross-over effects at quantum critical points

Enrico Carlon, Péter Lajkó, Ferenc Iglói

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Critical properties of quantum spin chains with varying degrees of disorder are studied at zero temperature by analytical and extensive density matrix renormalization methods. Generally the phase diagram is found to contain three phases. The weak disorder regime, where the critical behavior is controlled by the fixed points of the pure system, and the strong disorder regime, which is attracted by an infinite randomness fixed point, are separated by an intermediate disorder regime, where dynamical scaling is anisotropic and the static and dynamical exponents are disorder dependent.

Original languageEnglish
Pages (from-to)277201-277201-4
JournalPhysical review letters
Volume87
Issue number27
DOIs
Publication statusPublished - Dec 31 2001

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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