Instability of isolated triplet excitations on the Shastry-Sutherland lattice

Article

关键词: DIMER GROUND-STATE;    MAGNETIZATION PLATEAUS;    SRCU2(BO3)(2);    ORDER;    MODEL;   

DOI  :  10.1103/PhysRevB.65.212406

来源: SCIE

【 摘 要 】

Configurations of singlets and triplets on the Shastry-Sutherland lattice (SSL) have been proposed in the literature as variational ground states of the Shastry-Sutherland model at a fixed magnetization M. We prove that isolated triplet excitations on the SSL are unstable if the coupling alpha falls below a critical value alpha(c)approximate to2.0. The instability should be visible in the compound SrCu2(BO3)(2), where a coupling alpha*=1.48 is realized.

【 授权许可】

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