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Spin-1/2 Periodic Nonuniform XX Chains and the Spin-Peierls Instability

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Derzhko O., Richter J., Zaburannyi O.
Acta Physica Polonica A
|
2000
|
vol. 97
|
issue 5
931-934
EN
Using continued fractions we obtained the exact result for the density of magnon states of the regularly alternating spin-1/2 XX chain with the Dzyaloshinskii-Moriya interaction. We examined the stability of the magnetic chain with respect to the spin-Peierls dimerization.
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