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. 9, p. 094431
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 et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/299706
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