Low-temperature properties of the generalized two-chain quantum spin model

Sooa Park, K. Lee

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


We consider an exactly solvable two-chain quantum spin-1/2 model in a generalized form with enhanced spin frustration. This model is exactly diagonalized via Bethe's ansatz. The low-temperature specific heat of the system is obtained with and without a magnetic field, using the thermodynamic Bethe ansatz equations. We also calculate the magnetic susceptibility in a sufficiently weak field, yielding typical logarithmic corrections. The spin frustration affects only the amplitudes in the magnetic susceptibility and the specific heat. This extends the previous results for a simple two-chain quantum spin model to the generalized one.

Original languageEnglish
Pages (from-to)6569-6578
Number of pages10
JournalJournal of Physics A: Mathematical and General
Issue number31
StatePublished - 7 Aug 1998


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