Elastic backscattering of edge electrons and light absorption on a smooth edge of a 2D topological insulator

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Elastic backscattering of edge electrons and light absorption on a smooth edge of a 2D topological insulator. / Mahmoodian, M. M.; Entin, M. V.

In: Journal of Physics Condensed Matter, Vol. 33, No. 39, 395302, 09.2021.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{e024ae745d1f478bb16516c2039d112e,

title = "Elastic backscattering of edge electrons and light absorption on a smooth edge of a 2D topological insulator",

abstract = "2D topological insulator edge states are considered within the Volkov-Pankratov Hamiltonian. A smooth transition between a topological and ordinary insulator is assumed. The edge states are formed in the total gap of homogeneous 2D material. We found the energy spectrum, wave functions, together with the matrix elements of the impurity potential, and the velocity operator between these states. A pair of states have linear dispersion (the Weyl states), others have gapped Dirac spectra. Optical selection rules are found. It is stated that the Weyl states do not experience the backscattering, while the elastic scattering is permitted between the Dirac states or between the Weyl and Dirac states. ",

keywords = "elastic backscattering, light absorption, topological insulator, topological protection, Weyl and Dirac states",

author = "Mahmoodian, {M. M.} and Entin, {M. V.}",

year = "2021",

month = sep,

doi = "10.1088/1361-648X/ac123a",

language = "English",

volume = "33",

journal = "Journal of Physics Condensed Matter",

issn = "0953-8984",

publisher = "IOP Publishing Ltd.",

number = "39",

}

RIS

TY - JOUR

T1 - Elastic backscattering of edge electrons and light absorption on a smooth edge of a 2D topological insulator

AU - Mahmoodian, M. M.

AU - Entin, M. V.

PY - 2021/9

Y1 - 2021/9

N2 - 2D topological insulator edge states are considered within the Volkov-Pankratov Hamiltonian. A smooth transition between a topological and ordinary insulator is assumed. The edge states are formed in the total gap of homogeneous 2D material. We found the energy spectrum, wave functions, together with the matrix elements of the impurity potential, and the velocity operator between these states. A pair of states have linear dispersion (the Weyl states), others have gapped Dirac spectra. Optical selection rules are found. It is stated that the Weyl states do not experience the backscattering, while the elastic scattering is permitted between the Dirac states or between the Weyl and Dirac states.

AB - 2D topological insulator edge states are considered within the Volkov-Pankratov Hamiltonian. A smooth transition between a topological and ordinary insulator is assumed. The edge states are formed in the total gap of homogeneous 2D material. We found the energy spectrum, wave functions, together with the matrix elements of the impurity potential, and the velocity operator between these states. A pair of states have linear dispersion (the Weyl states), others have gapped Dirac spectra. Optical selection rules are found. It is stated that the Weyl states do not experience the backscattering, while the elastic scattering is permitted between the Dirac states or between the Weyl and Dirac states.

KW - elastic backscattering

KW - light absorption

KW - topological insulator

KW - topological protection

KW - Weyl and Dirac states

UR - http://www.scopus.com/inward/record.url?scp=85111596302&partnerID=8YFLogxK

U2 - 10.1088/1361-648X/ac123a

DO - 10.1088/1361-648X/ac123a

M3 - Article

C2 - 34233311

AN - SCOPUS:85111596302

VL - 33

JO - Journal of Physics Condensed Matter

JF - Journal of Physics Condensed Matter

SN - 0953-8984

IS - 39

M1 - 395302

ER -

ID: 29234172