Permutation-Symmetric Multicritical Points in Random Antiferromagnetic Spin Chains

Kedar Damle, David A. Huse

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29 Scopus citations

Abstract

We present a general theory of a class of multicritical points in the phase diagrams of random antiferromagnetic spin chains. We show that low-energy properties of these points are almost completely determined by a permutation symmetry of the effective theory not shared by the microscopic Hamiltonian. One case provides an analytic theory of the quantum critical point in the random spin-[Formula presented] chain, studied in a recent work by Refael, Kehrein, and Fisher.

Original languageEnglish (US)
JournalPhysical review letters
Volume89
Issue number27
DOIs
StatePublished - Jan 1 2002

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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