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순수물리이론 연구단
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Edge states at an intersection of edges of a topological material

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Title
Edge states at an intersection of edges of a topological material
Author(s)
Koji Hashimoto; Xi Wu; Taro Kimura
Publication Date
2017-04
Journal
PHYSICAL REVIEW B, v.95, no., pp.165443 -
Publisher
AMER PHYSICAL SOC
Abstract
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 fivedimensional 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. © 2017 American Physical Society
URI
http://pr.ibs.re.kr/handle/8788114/3723
DOI
10.1103/PhysRevB.95.165443
ISSN
2469-9950
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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