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The spin-1/2 transverse XX chain with regularly alternating bonds and fields

Oleg Derzhko, Johannes Richter, Oles' Zaburannyi

cond-matarXiv:cond-mat/9909251

Abstract

We use continued fractions for a study of the thermodynamic properties of the periodic nonuniform spin-1/2 isotropic XY chain in a non-random/random (Lorentzian) transverse field. The obtained results permit to examine the influence of a magnetic field and randomness on the spin-Peierls dimerization.

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