Integrable anisotropic spin-ladder model
Nenhuma Miniatura disponível
Data
2001-08-01
Autores
Tonel, Arlei Prestes
Foerster, Angela
Links, Jon
Malvezzi, Andre Luiz [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
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.
Descrição
Palavras-chave
Como citar
Physical Review B - Condensed Matter and Materials Physics, v. 64, n. 5, p. 0544201-0544205, 2001.