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Topological States on Interfaces Protected by Symmetry

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In this book, the author theoretically studies two aspects of topological states.

First, novel states arising from hybridizing surface states of topological insulators are theoretically introduced. As a remarkable example, the author shows the existence of gapless interface states at the interface between two different topological insulators, which belong to the same topological phase. While such interface states are usually gapped due to hybridization, the author proves that the interface states are in fact gapless when the two topological insulators have opposite chiralities. This is the first time that gapless topological novel interface states protected by mirror symmetry have been proposed.

Second, the author studies the Weyl semimetal phase in thin topological insulators subjected to a magnetic field. This Weyl semimetal phase possesses edge states showing abnormal dispersion, which is not observed without mirror symmetry. The author explains that the edge states gain a finite velocity by a particular form of inversion symmetry breaking, which makes it possible to observe the phenomenon by means of electric conductivity.

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Publisher

Springer Japan : Springer Tokyo., 2015

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Language

English

ISBN/ISSN

978-4-431-55534-6

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NONE

Content Type

text

Media Type

computer

Carrier Type

online resource

Edition

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Subject(s)

Phase Transitions and Multiphase Systems
Thin films
Superconductivity
Solid State Physics
Surfaces and Interfaces
Strongly Correlated Systems
Surface and Interface Science

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Statement of Responsibility

Ryuji Takahashi

Other Information

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Yudi

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