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APS March Meeting Abstracts

Field-induced spin liquids, orders, and gaps in frustrated bond-alternating quantum spin chain

Tôru Sakai, Nobuya Maeshima, Kouichi Okunishi, Kiyomi Okamoto

Published Mar 1, 2004• 0 citations
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Journal of the Physical Society of Japan•Jan 1, 2005•9 citations
We study the frustration-induced enhancement of the incommensurate correlation for a bond-alternating quantum spin chain in a magnetic field, which is associated with a quasi-one-dimensional organic compound F5PNN. We investigate the temperature dependence of the staggered susceptibilities by using the density matrix renormalization group, and then find that the incommensurate correlation becomes dominant in a certain range of the magnetic field. We also discuss the mechanism of this enhancement on the basis of the mapping to the effective S=1/2 XXZ chain and a possibility of the field-induced incommensurate long-range order.