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arXiv 1109.4745cond-mat.str-el
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莫特绝缘体中轨道激发与自旋涨落的内禀耦合

Intrinsic coupling of orbital excitations to spin fluctuations in Mott insulators

Krzysztof Wohlfeld, Maria Daghofer, Satoshi Nishimoto, Giniyat Khaliullin, Jeroen van den Brink

摘要:

我们展示了如何在强相关的氧化物,自旋和轨道的两个基本的自由度之间的一般和基本的不对称性,有非常深刻的影响的基本自旋和轨道激发。而磁振子在很大程度上保持不受影响,轨道成为固有的耦合与反铁磁和铁磁轨道有序基态的自旋轨道模型中的自旋波动。出现的复合轨道-磁振子模式在一维中再次分裂,在自旋子比轨道快的特殊区域中产生自旋-轨道分离。

英文摘要:

We show how the general and basic asymmetry between two fundamental degrees of freedom present in strongly correlated oxides, spin and orbital, has very profound repercussions on the elementary spin and orbital excitations. Whereas the magnons remain largely unaffected, orbitons become inherently coupled with spin fluctuations in spin-orbital models with antiferromagnetic and ferroorbital ordered ground states. The composite orbiton-magnon modes that emerge fractionalize again in one dimension, giving rise to spin-orbital separation in the peculiar regime where spinons are faster than orbitons.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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