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arXiv 1105.5963cond-mat.mes-hall
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自旋霍尔绝缘体拓扑性质的光学工程

Optically engineering the topological properties of a spin Hall insulator

Balázs Dóra, Jérôme Cayssol, Ferenc Simon, Roderich Moessner

摘要:

通过改变Floquet能带结构,时间周期扰动可以用来设计物质的拓扑性质。这是证明了在单色圆偏振光的存在下的自旋霍尔绝缘体。边缘态的固有自旋结构受塞曼耦合的影响,而不是由轨道效应。的光电流(和沿边缘的磁化)开发一个有限的,螺旋度依赖的期望值,并从耗散到耗散的辐射频率增加,信号的拓扑性质的变化。讨论了与Thouless的电荷泵浦和非平衡Zitterbewegung的联系,以及可能的实验。

英文摘要:

Time-periodic perturbations can be used to engineer topological properties of matter by altering the Floquet band structure. This is demonstrated for a spin Hall insulator in the presence of monochromatic circularly polarized light. The inherent spin structure of the edge state is influenced by the Zeeman coupling and not by the orbital effect. The photocurrent (and the magnetization along the edge) develops a finite, helicity dependent expectation value and turns from dissipationless to dissipative with increasing radiation frequency, signalling a change in the topological properties. The connection with Thouless' charge pumping and non-equilibrium Zitterbewegung is discussed, together with possible experiments.

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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