Universality class of an S=1/2 quantum spin ladder system with four-spin exchange

Keigo Hijii, Kiyohide Nomura

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

We study a s=1/2 Heisenberg spin ladder with four-spin exchange. Combining numerical results with conformal field theory, we find a phase transition with central charge c=3/2. Since this system has an SU(2) symmetry, we can conclude that this critical theory is described by k=2 SU(2) Wess-Zumino-Witten model with Z2 symmetry breaking.

Original languageEnglish
Article number104413
Pages (from-to)1044131-1044136
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number10
Publication statusPublished - Mar 1 2002

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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