Analytical theory and possible detection of the ac quantum spin Hall effect

Analytical theory and possible detection of the ac quantum spin Hall effect

Abstract We develop an analytical theory of the low-frequency ac quantum spin Hall (QSH) effect based upon the scattering matrix formalism. It is shown that the ac QSH effect can be interpreted as a bulk quantum pumping effect. When the electron spin is conserved, the integer-quantized ac spin Hall...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: W. Y. Deng, Y. J. Ren, Z. X. Lin, R. Shen, L. Sheng, D. N. Sheng, D. Y. Xing
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2017
Materias:
Medicine
R
Science
Q
Acceso en línea:https://doaj.org/article/c1b5c66e073847bb91c7e8400654ed8f
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
id oai:doaj.org-article:c1b5c66e073847bb91c7e8400654ed8f
record_format dspace
spelling oai:doaj.org-article:c1b5c66e073847bb91c7e8400654ed8f2021-12-02T15:06:26ZAnalytical theory and possible detection of the ac quantum spin Hall effect10.1038/s41598-017-05452-42045-2322https://doaj.org/article/c1b5c66e073847bb91c7e8400654ed8f2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05452-4https://doaj.org/toc/2045-2322Abstract We develop an analytical theory of the low-frequency ac quantum spin Hall (QSH) effect based upon the scattering matrix formalism. It is shown that the ac QSH effect can be interpreted as a bulk quantum pumping effect. When the electron spin is conserved, the integer-quantized ac spin Hall conductivity can be linked to the winding numbers of the reflection matrices in the electrodes, which also equal to the bulk spin Chern numbers of the QSH material. Furthermore, a possible experimental scheme by using ferromagnetic metals as electrodes is proposed to detect the topological ac spin current by electrical means.W. Y. DengY. J. RenZ. X. LinR. ShenL. ShengD. N. ShengD. Y. XingNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
W. Y. Deng
Y. J. Ren
Z. X. Lin
R. Shen
L. Sheng
D. N. Sheng
D. Y. Xing
Analytical theory and possible detection of the ac quantum spin Hall effect
description Abstract We develop an analytical theory of the low-frequency ac quantum spin Hall (QSH) effect based upon the scattering matrix formalism. It is shown that the ac QSH effect can be interpreted as a bulk quantum pumping effect. When the electron spin is conserved, the integer-quantized ac spin Hall conductivity can be linked to the winding numbers of the reflection matrices in the electrodes, which also equal to the bulk spin Chern numbers of the QSH material. Furthermore, a possible experimental scheme by using ferromagnetic metals as electrodes is proposed to detect the topological ac spin current by electrical means.
format article
author W. Y. Deng
Y. J. Ren
Z. X. Lin
R. Shen
L. Sheng
D. N. Sheng
D. Y. Xing
author_facet W. Y. Deng
Y. J. Ren
Z. X. Lin
R. Shen
L. Sheng
D. N. Sheng
D. Y. Xing
author_sort W. Y. Deng
title Analytical theory and possible detection of the ac quantum spin Hall effect
title_short Analytical theory and possible detection of the ac quantum spin Hall effect
title_full Analytical theory and possible detection of the ac quantum spin Hall effect
title_fullStr Analytical theory and possible detection of the ac quantum spin Hall effect
title_full_unstemmed Analytical theory and possible detection of the ac quantum spin Hall effect
title_sort analytical theory and possible detection of the ac quantum spin hall effect
publisher Nature Portfolio
publishDate 2017
url https://doaj.org/article/c1b5c66e073847bb91c7e8400654ed8f
work_keys_str_mv AT wydeng analyticaltheoryandpossibledetectionoftheacquantumspinhalleffect
AT yjren analyticaltheoryandpossibledetectionoftheacquantumspinhalleffect
AT zxlin analyticaltheoryandpossibledetectionoftheacquantumspinhalleffect
AT rshen analyticaltheoryandpossibledetectionoftheacquantumspinhalleffect
AT lsheng analyticaltheoryandpossibledetectionoftheacquantumspinhalleffect
AT dnsheng analyticaltheoryandpossibledetectionoftheacquantumspinhalleffect
AT dyxing analyticaltheoryandpossibledetectionoftheacquantumspinhalleffect
_version_ 1718388477509238784

Ejemplares similares