arXiv 1102.08472011-02-04cond-mat.stat-mech

Ground-state properties of the spin-1/2 Heisenberg-Ising bond alternating chain with Dzyaloshinskii-Moriya interaction

J. Strecka, L. Galisova, O. Derzhko

备注：: 6 pages, 3 figures
发表信息：: Acta Phys. Pol. A 118 (2010) 742

英文摘要：

Ground-state energy is exactly calculated for the spin-1/2 Heisenberg-Ising bond alternating chain with the Dzyaloshinskii-Moriya interaction. Under certain condition, which relates a strength of the Ising, Heisenberg and Dzyaloshinskii-Moriya interactions, the ground-state energy exhibits an interesting nonanalytic behavior accompanied with a gapless excitation spectrum.

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