On the anisotropic Heisenberg chain

✍ Scribed by E.J. van Dongen; H.W. Capel; Th.J. Siskens

• Publisher: Elsevier Science
• Year: 1975
• Tongue: English
• Weight: 871 KB
• Volume: 79
• Category: Article
• ISSN: 0378-4371
• DOI: 10.1016/0378-4371(75)90010-2

✦ Synopsis

High-temperature expansions are derived for the specific heat and the xzz element of the susceptibility tensor for a linear chain of spins _t with anisotropic nearest-neighbour interactions.

(The coupling constants Ji , J2 and J3 are chosen to be different.) Use is made of exact results of the XY model, a first-order perturbation calculation in J 3, a high-temperature expansion for the transverse susceptibility xxx 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.