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arXiv 2107.03409cond-mat.str-elcond-mat.mes-hall
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拓扑晶体绝缘体和拓扑晶体的有效场论

Effective field theories of topological crystalline insulators and topological crystals

Sheng-Jie Huang, Chang-Tse Hsieh, Jiabin Yu

摘要:

我们提出了一种获得拓扑晶体绝缘体的有效场论的一般方法,其低能理论由大量狄拉克费米子描述。我们表明,这些阶段的特点是与接口的空间相关的质量参数的响应。这些质量接口实现降维过程,使得感兴趣的状态被平滑地变形为拓扑晶体,其用作一般分类中的相的代表性状态。通过对有质量狄拉克费米子的积分,得到了有效场论,揭示了各种量子化拓扑项。我们的方法可以推广到其他晶体对称性保护的拓扑相位,并提供了一个通用的策略,以获得有效场论,这样的晶体拓扑相位。

英文摘要:

We present a general approach to obtain effective field theories for topological crystalline insulators whose low-energy theories are described by massive Dirac fermions. We show that these phases are characterized by the responses to spatially dependent mass parameters with interfaces. These mass interfaces implement the dimensional reduction procedure such that the state of interest is smoothly deformed into a topological crystal, which serves as a representative state of a phase in the general classification. Effective field theories are obtained by integrating out the massive Dirac fermions, and various quantized topological terms are uncovered. Our approach can be generalized to other crystalline symmetry protected topological phases and provides a general strategy to derive effective field theories for such crystalline topological phases.

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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