On the anisotropic Heisenberg chain

E.J. van Dongen, H.W. Capel and Th.J. Siskens

Physica A: Statistical Mechanics and its Applications, 1975, vol. 79, issue 6, 617-633

Abstract: High-temperature expansions are derived for the specific heat and the χzz element of the susceptibility tensor for a linear chain of spins 12 with anisotropic nearest-neighbour interactions. (The coupling constants J1, J2 and J3 are chosen to be different.) Use is made of exact results of the XY model, a first-order perturbation calculation in J3, a high-temperature expansion for the transverse susceptibility χxx of the anisotropic XY model and the high-temperature expansion for the isotropic Heisenberg chain. Some characteristic features of deviations from the case of axial symmetry in the coupling constants are discussed.

Date: 1975
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:79:y:1975:i:6:p:617-633

DOI: 10.1016/0378-4371(75)90010-2

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