Spin-1/2 periodic nonuniform XX chains and the spin-Peierls instability
arXiv:cond-mat/9908385
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.
4 pages, latex with pmart.sty (included), no figures; poster presentation at the European Conference "Physics of Magnetism 99", Poznan 1999