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

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 conductiv...

Descripción completa

Detalles Bibliográficos
Autores principales: Deng, W. Y., Ren, Y. J., Lin, Z. X., Shen, R., Sheng, L., Sheng, D. N., Xing, D. Y.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5505995/
https://www.ncbi.nlm.nih.gov/pubmed/28698631
http://dx.doi.org/10.1038/s41598-017-05452-4
_version_ 1783249499248918528
author Deng, W. Y.
Ren, Y. J.
Lin, Z. X.
Shen, R.
Sheng, L.
Sheng, D. N.
Xing, D. Y.
author_facet Deng, W. Y.
Ren, Y. J.
Lin, Z. X.
Shen, R.
Sheng, L.
Sheng, D. N.
Xing, D. Y.
author_sort Deng, W. Y.
collection PubMed
description 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 Online
Article
Text
id pubmed-5505995
institution National Center for Biotechnology Information
language English
publishDate 2017
publisher Nature Publishing Group UK
record_format MEDLINE/PubMed
spelling pubmed-55059952017-07-13 Analytical theory and possible detection of the ac quantum spin Hall effect Deng, W. Y. Ren, Y. J. Lin, Z. X. Shen, R. Sheng, L. Sheng, D. N. Xing, D. Y. Sci Rep Article 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. Nature Publishing Group UK 2017-07-11 /pmc/articles/PMC5505995/ /pubmed/28698631 http://dx.doi.org/10.1038/s41598-017-05452-4 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Deng, W. Y.
Ren, Y. J.
Lin, Z. X.
Shen, R.
Sheng, L.
Sheng, D. N.
Xing, D. Y.
Analytical theory and possible detection of the ac quantum spin Hall effect
title 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_short 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
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5505995/
https://www.ncbi.nlm.nih.gov/pubmed/28698631
http://dx.doi.org/10.1038/s41598-017-05452-4
work_keys_str_mv AT dengwy analyticaltheoryandpossibledetectionoftheacquantumspinhalleffect
AT renyj analyticaltheoryandpossibledetectionoftheacquantumspinhalleffect
AT linzx analyticaltheoryandpossibledetectionoftheacquantumspinhalleffect
AT shenr analyticaltheoryandpossibledetectionoftheacquantumspinhalleffect
AT shengl analyticaltheoryandpossibledetectionoftheacquantumspinhalleffect
AT shengdn analyticaltheoryandpossibledetectionoftheacquantumspinhalleffect
AT xingdy analyticaltheoryandpossibledetectionoftheacquantumspinhalleffect

Ejemplares similares