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首页> 外文期刊>Jahresbericht der Deutschen Mathematiker-Vereinigung >Topological Insulators from the Perspective of Non-commutative Geometry and Index Theory
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Topological Insulators from the Perspective of Non-commutative Geometry and Index Theory

机译:非交换几何和指数理论视角下的拓扑绝缘子

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摘要

Topological insulators are solid state systems of independent electrons for which the Fermi level lies in a mobility gap, but the Fermi projection is nevertheless topologically non-trivial, namely it cannot be deformed into that of a normal insulator. This non-trivial topology is encoded in adequately defined invariants and implies the existence of surface states that are not susceptible to Anderson localization. This non-technical review reports on recent progress in the understanding of the underlying mathematical structures, with a particular focus on index theory.
机译:拓扑绝缘体是费米能级位于迁移率间隙中的独立电子的固态系统,但费米投影在拓扑上是不平凡的,也就是说,它不能变形为普通绝缘体。这种非平凡的拓扑结构以适当定义的不变性进行编码,并暗示存在不易受Anderson局限的表面状态。这份非技术性的综述报告了对底层数学结构的理解的最新进展,特别着重于指数理论。

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