paper

Frustration-induced phase transitions in the spin-S orthogonal-dimer chain

arXiv:cond-mat/0201518 · doi:10.1103/PhysRevB.65.214415

Abstract

We investigate quantum phase transitions in the frustrated orthogonal-dimer chain with an arbitrary spin . When the ratio of the competing exchange couplings is varied, first-order phase transitions occur 2S times among distinct spin-gap phases. The introduction of single-ion anisotropy further enriches the phase diagram. The phase transitions described by the present model possess most of the essential properties inherent in frustrated quantum spin systems.

4 pages, 9 figures

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