Propagating S=1/2 particles in S=1 Haldane-gap systems.
Propagating S=1/2 particles in S=1 Haldane-gap systems.
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在 S=1 Haldane 间隙系统中传播 S=1/2 粒子。
DOI：
10.1103/physrevb.52.r715
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
Shiba
中科院分区：
文献类型：
--
作者：
Penc;Shiba
Inspired by the recent experiments on ${\mathrm{Y}}_{2\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Ca}}_{\mathit{x}}$${\mathrm{BaNiO}}_{5}$, we discuss the dispersion relation of the S=1/2 particles in the S=1 Heisenberg and valence bond solid model in the limit of small hopping amplitudes. The effective S=1/2 edge spins mix with the spin of the impurity resulting in one fourfold and two twofold degenerate bands. We briefly discuss the interaction between the S=1/2 particles arising from the background.
Inspired by the recent experiments on ${\mathrm{Y}}_{2\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Ca}}_{\mathit{x}}$${\mathrm{BaNiO}}_{5}$, we discuss the dispersion relation of the S=1/2 particles in the S=1 Heisenberg and valence bond solid model in the limit of small hopping amplitudes. The effective S=1/2 edge spins mix with the spin of the impurity resulting in one fourfold and two twofold degenerate bands. We briefly discuss the interaction between the S=1/2 particles arising from the background.