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arXiv 1004.2688cond-mat.mes-hall
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二维拓扑绝缘体中的霍尔和自旋霍尔粘滞比

Hall and spin Hall viscosity ratio in 2d topological insulators

Taro Kimura

摘要:

研究了拓扑绝缘体模型对度规扰动的响应。在本文中,我们引入了一个新的量,霍尔粘度粒子密度比,这是类似于由AdS/CFT对应建议的粘度熵比。这个量对应于表征量子霍尔态的填充分数,因此它可以在Halfman的零场量子霍尔系统中讨论。我们还考虑了与自旋流有关的时反不变量子自旋霍尔系统中的无耗散粘性。

英文摘要:

We study responses to metric perturbation in topological insulator models. In this paper we introduce a novel quantity, Hall viscosity to particle density ratio, which is analogous to the viscosity to entropy ratio suggested by AdS/CFT correspondence. This quantity corresponds to the filling fraction which characterizes the quantum Hall states, and hence it could be discussed in Haldane's zero-field quantum Hall system. We also consider dissipationless viscosity in the time reversal invariant quantum spin Hall system, which is related to a spin current.

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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