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
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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
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 4205
- DOI 10.1103/PhysRevB.69.094431
- Persistent URL
- https://folia.unifr.ch/unifr/documents/299706
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