### 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 Z_{2} symmetry breaking.

Original language | English |
---|---|

Article number | 104413 |

Pages (from-to) | 1044131-1044136 |

Number of pages | 6 |

Journal | Physical Review B - Condensed Matter and Materials Physics |

Volume | 65 |

Issue number | 10 |

Publication status | Published - Mar 1 2002 |

### Fingerprint

### All Science Journal Classification (ASJC) codes

- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics

### Cite this

*Physical Review B - Condensed Matter and Materials Physics*,

*65*(10), 1044131-1044136. [104413].

**Universality class of an S=1/2 quantum spin ladder system with four-spin exchange.** / Hijii, Keigo; Nomura, Kiyohide.

Research output: Contribution to journal › Article

*Physical Review B - Condensed Matter and Materials Physics*, vol. 65, no. 10, 104413, pp. 1044131-1044136.

}

TY - JOUR

T1 - Universality class of an S=1/2 quantum spin ladder system with four-spin exchange

AU - Hijii, Keigo

AU - Nomura, Kiyohide

PY - 2002/3/1

Y1 - 2002/3/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0036496935&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036496935&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0036496935

VL - 65

SP - 1044131

EP - 1044136

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

SN - 1098-0121

IS - 10

M1 - 104413

ER -