Domain-wall, overlap, and topological insulators

Taro Kimura

Research output: Contribution to journalArticlepeer-review


Topological insulators are a new class of materials which have gapped spectra in the bulk, but are accompanied by topologically protected gapless excitations at the surface (edge) of the system. These phenomena have a close relationship with symmetry and dimensionality of the system through quantum anomalies. We point out that such a surface state is a physical realization of the domain-wall/overlap fermion. From this point of view, we discuss its implications for experiments of topological insulators. We also discuss an unconventional overlap fermion, which is suggested by the "periodic table" of topological insulators and superconductors.

Original languageEnglish
Article number042
JournalUnknown Journal
Publication statusPublished - 2015

ASJC Scopus subject areas

  • General


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