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Energy spectrum and thermodynamics of anisotropic spin-1/2 two-leg ladder

2006-08-15
Cheranovskii, V. O.
Chovpan, A. A.
Ezerskaya, E. V.
Özkan, İlker
We studied the energy spectrum and some finite temperature properties of two-leg spin-1/2 ladder with XXZ interactions in legs and rungs. It is shown that for a strong ferromagnetic interchain interaction, there is a first-order transition between ferromagnetic and nonmagnetic phases. The anisotropic ladder in the magnetic field may have up to four low-temperature maxima in the temperature dependence of specific heat. (c) 2006 Wiley Periodicals, Inc.