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Note on the thermodynamic Bethe ansatz approach to the quantum phase diagram of the strong coupling ladder compounds

Batchelor, Murray T.; Guan, Xi-Wen; Foerster, Angela; Zhou, H-Q.


We investigate the low-temperature phase diagram of the exactly solved su(4) two-leg spin ladder as a function of the rung coupling J⊥ and magnetic field H by means of the thermodynamic Bethe ansatz (TBA). In the absence of a magnetic field the model exhibits three quantum phases, while in the presence of a strong magnetic field there is no singlet ground state for ferromagnetic rung coupling. For antiferromagnetic rung coupling, there is a gapped phase in the regime H < Hc1, a fully...[Show more]

CollectionsANU Research Publications
Date published: 2003-08-11
Type: Journal article
Source: New Journal of Physics


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