Journal article

Phase diagram of the Heisenberg spin ladder with ring exchange

  • Gritsev, Vladimir Theoretical Physics Group, Physics Department, University of Fribourg, Switzerland
  • Normand, Bruce Theoretical Physics Group, Physics Department, University of Fribourg, Switzerland
  • Baeriswyl, Dionys Theoretical Physics Group, Physics Department, University of Fribourg, Switzerland
    25.11.2003
Published in:
  • Physical Review B. - 2004, vol. 69, no. 094431-94446
English We investigate the phase diagram of a generalized spin-1/2 quantum antiferromagnet on a ladder with rung, leg, diagonal, and ring-exchange interactions. We consider the exactly soluble models associated with the problem, obtain the exact ground states which exist for certain parameter regimes, and apply a variety of perturbative techniques in the regime of strong ring-exchange coupling. By combining these approaches with considerations related to the discrete Z4 symmetry of the model, we present the complete phase diagram.
Faculty
Faculté des sciences
Department
Physique
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/299706
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