Phase transition of S= 1 2 two-leg Heisenberg spin ladder systems with a four-spin interaction

Keigo Hijii, Kiyohide Nomura

研究成果: Contribution to journalArticle査読

5 被引用数 (Scopus)

抄録

We study a phase transition and critical properties of the quantum spin ladder system with a four-spin interaction. We determine a phase boundary between a rung singlet and a staggered dimer phases numerically. This phase transition is of a second order in the weak-coupling region. We confirm that this universality class is described by the k=2 SU(2) Wess-Zumino-Witten model, analyzing the central charge and scaling dimensions. In the strong-coupling region, phase transition becomes of a first order.

本文言語英語
論文番号014426
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
80
1
DOI
出版ステータス出版済み - 8 6 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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