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arXiv 0904.0690cond-mat.mes-hall
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三维拓扑绝缘体的自发对称性破缺

Topological insulators in three dimensions from spontaneous symmetry breaking

Yi Zhang, Ying Ran, Ashvin Vishwanath

摘要:

我们研究三维系统,强排斥导致绝缘状态通过自发产生的自旋轨道相互作用。我们讨论了一个微观模型的结果状态是拓扑的。这种拓扑“莫特”绝缘体不同于它们的带绝缘体对应物,因为它们具有额外的序参量,旋转矩阵,描述自旋旋转对称性的自发破缺。我们发现,这个顺序的线缺陷与受保护的一维模式在{ \em强}拓扑莫特绝缘体,这提供了一个散装表征这一阶段。

英文摘要:

We study three dimensional systems where strong repulsion leads to an insulating state via spontaneously generated spin-orbit interactions. We discuss a microscopic model where the resulting state is topological. Such topological `Mott' insulators differ from their band insulator counterparts in that they possess an additional order parameter, a rotation matrix, that describes the spontaneous breaking of spin-rotation symmetry. We show that line defects of this order are associated with protected one dimensional modes in the {\em strong} topological Mott insulator, which provides a bulk characterization of this phase.

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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