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Three-dimensional symmetry-breaking nontrivial topological states

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Title: Three-dimensional symmetry-breaking nontrivial topological states
Authors: Habe, Tetsuro Browse this author
Asano, Yasuhiro Browse this author →KAKEN DB
Issue Date: 20-Mar-2014
Publisher: American Physical Society
Journal Title: Physical Review B
Volume: 89
Issue: 11
Start Page: 115203-1
End Page: 115203-5
Publisher DOI: 10.1103/PhysRevB.89.115203
Abstract: We discuss topological electronic states described by the Dirac Hamiltonian plus an additional one in three dimensions. When the additional Hamiltonian is an element of an Abelian group, electronic states become topologically nontrivial even in the absence of the fundamental symmetries such as the time-reversal symmetry and the particle-hole one. Such symmetry-breaking topological states are characterized by the Chern number defined in the two-dimensional partial Brillouin zone. The topological insulators in Zeeman fields are an example of the symmetry-breaking topological electric state. We show the crossover from the topological insulating phase to the topological semimetal one in strong Zeeman fields.
Rights: ©2014 American Physical Society
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 浅野 泰寛

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