Topological States on Interfaces Protected by Symmetry: Springer Theses
Autor Ryuji Takahashien Limba Engleză Hardback – 22 apr 2015
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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Specificații
ISBN-13: 9784431555339
ISBN-10: 4431555331
Pagini: 100
Ilustrații: XII, 90 p. 40 illus., 6 illus. in color.
Dimensiuni: 155 x 235 x 12 mm
Greutate: 0.33 kg
Ediția:2015
Editura: Springer
Colecția Springer
Seria Springer Theses
Locul publicării:Tokyo, Japan
ISBN-10: 4431555331
Pagini: 100
Ilustrații: XII, 90 p. 40 illus., 6 illus. in color.
Dimensiuni: 155 x 235 x 12 mm
Greutate: 0.33 kg
Ediția:2015
Editura: Springer
Colecția Springer
Seria Springer Theses
Locul publicării:Tokyo, Japan
Public țintă
ResearchCuprins
Introduction.- Topological Invariant and topological Phases.- Gapless Interface States between Two Topological Insulators.- Weyl Semimetals in a Thin Topological Insulator.- Summary and outlook.- Properties of the Chern numbers.- Calculation for the interface Fermi loops.
Notă biografică
Dr. Ryuji Takahashi
Department of Applied Physics, The University of Tokyo
takahashi@appi.t.u-tokyo.ac.jp
Department of Applied Physics, The University of Tokyo
takahashi@appi.t.u-tokyo.ac.jp
Textul de pe ultima copertă
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.
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.
Caracteristici
Proves the significance of mirror symmetry and chirality in topological insulators Provides a detailed description of the various phenomena when two surface states of topological insulators hybridize, depending on the chirality Examines those signs of the Dirac velocities that determine whether the interface states between two topological insulators are metallic or insulating. Nominated as an outstanding contribution by the Tokyo Institute of Technology’s Physics Department in 2013 Includes supplementary material: sn.pub/extras