Edge states at an intersection of edges of a topological material

Koji Hashimoto, Xi Wu, Taro Kimura

研究成果: Article査読

40 被引用数 (Scopus)

抄録

We study an exotic state which is localized only at an intersection of edges of a topological material. This "edge-of-edge" state is shown to exist generically. We construct explicitly generic edge-of-edge states in five-dimensional Weyl semimetals and their dimensional reductions, such as four-dimensional topological insulators of class A and three-dimensional chiral topological insulators of class AIII. The existence of the edge-of-edge state is due to a topological charge of the edge states. The notion of the Berry connection is generalized to include the space of all possible boundary conditions, where Chern-Simons forms are shown to be nontrivial.

本文言語English
論文番号165443
ジャーナルPhysical Review B
95
16
DOI
出版ステータスPublished - 2017 4月 25

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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