Spin-1/2 periodic nonuniform XX chains and the spin-Peierls instability
O. Derzhko, J. Richter, O. Zaburannyi
Abstract
Using continued fractions we obtained the exact result for the density of magnon states of the regularly alternating spin-1/2 XX chain with Dzyaloshinskii-Moriya interaction. We examined the stability of the magnetic chain with respect to the spin-Peierls dimerization.
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