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

Keigo Hijii, Kiyohide Nomura

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number014426
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number1
DOIs
Publication statusPublished - Aug 6 2009

Fingerprint

Ladders
ladders
Phase transitions
interactions
Phase boundaries
Dimers
dimers
scaling

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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AB - 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.

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