Published August 1, 2001
| Version v1
Journal article
Integrable anisotropic spin-ladder model
- 1. Instituto de Fisica da UFRGS, Avenida Bento Goncalves 9500, Porto Alegre, RS (Brazil)
- 2. Department of Mathematics, University of Queensland, Queensland, 4072 (Australia)
- 3. Departamento de Fisica da UNESP, Avenida Eng. Luiz Edmundo Carrijo Coube, s/n, Bauru, SP (Brazil)
Description
We present an integrable spin-ladder model, which possesses a free parameter besides the rung coupling J. Wang's system based on the SU(4) symmetry can be obtained as a special case. The model is exactly solvable by means of the Bethe ansatz method. We determine the dependence on the anisotropy parameter of the phase transition between gapped and gapless spin excitations and present the phase diagram. Finally, we show that the model is a special case of a more general Hamiltonian with three free parameters
Additional details
Identifiers
Publishing Information
- Journal Title
- Physical Review. B, Condensed Matter and Materials Physics
- Journal Volume
- 64
- Journal Issue
- 5
- Journal Page Range
- p. 054420-054420.5
- ISSN
- 1098-0121
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 35094061
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE; S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
- Descriptors DEI
- ANISOTROPY; COUPLING; EXCITATION; HAMILTONIANS; INTEGRAL CALCULUS; PHASE DIAGRAMS; PHASE TRANSFORMATIONS; SPIN; SU-4 GROUPS
- Descriptors DEC
- ANGULAR MOMENTUM; DIAGRAMS; ENERGY-LEVEL TRANSITIONS; INFORMATION; LIE GROUPS; MATHEMATICAL OPERATORS; MATHEMATICS; PARTICLE PROPERTIES; QUANTUM OPERATORS; SU GROUPS; SYMMETRY GROUPS
Optional Information
- Notes
- (c) 2001 The American Physical Society