Rashba spin-orbit coupling in graphene monolayer coated by periodic magnetic stripes

Abstract We investigate theoretically the effects of a modulated periodic perpendicular magnetic fields and the Rashba spin-orbit coupling (RSOC) on the electronic states and optical absorption spectrum in a graphene monolayer. The magnetic fields and supperlattice geometry give rise to distinct Dir...

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Autores principales:	Xiaojing Li, Zhenhua Wu, Jiangtao Liu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/fe87d21287f24cab8efcc7c8d8104984
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spelling	oai:doaj.org-article:fe87d21287f24cab8efcc7c8d81049842021-12-02T11:53:01ZRashba spin-orbit coupling in graphene monolayer coated by periodic magnetic stripes10.1038/s41598-017-06821-92045-2322https://doaj.org/article/fe87d21287f24cab8efcc7c8d81049842017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06821-9https://doaj.org/toc/2045-2322Abstract We investigate theoretically the effects of a modulated periodic perpendicular magnetic fields and the Rashba spin-orbit coupling (RSOC) on the electronic states and optical absorption spectrum in a graphene monolayer. The magnetic fields and supperlattice geometry give rise to distinct Dirac cone shift and open a finite bandgap at the Dirac point. In contrast to the energy spectrum without the RSOC interaction, we find that the RSOC term will develop a spin-splitting energy-momentum dispersion relation in this graphene magnetic supperlattice. Anisotropic and spin-split group velocities, effective masses and the momentum-dependent carrier distributions along the magnetic strips are demonstrated. And the manipulations of these exotic properties by tuning the magnetic fields and the RSOC are addressed systematically. Accordingly, we find bright-to-dark transitions in the electron-hole pairs transition rate spectrum and absorption peak splitting in the optical absorption spectrum tuned by the RSOC interaction. This feature offers us a practical way to detect these band engineering effects especially the exotic spin splitting states by using the conductance and optical technique.Xiaojing LiZhenhua WuJiangtao LiuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xiaojing Li Zhenhua Wu Jiangtao Liu Rashba spin-orbit coupling in graphene monolayer coated by periodic magnetic stripes
description	Abstract We investigate theoretically the effects of a modulated periodic perpendicular magnetic fields and the Rashba spin-orbit coupling (RSOC) on the electronic states and optical absorption spectrum in a graphene monolayer. The magnetic fields and supperlattice geometry give rise to distinct Dirac cone shift and open a finite bandgap at the Dirac point. In contrast to the energy spectrum without the RSOC interaction, we find that the RSOC term will develop a spin-splitting energy-momentum dispersion relation in this graphene magnetic supperlattice. Anisotropic and spin-split group velocities, effective masses and the momentum-dependent carrier distributions along the magnetic strips are demonstrated. And the manipulations of these exotic properties by tuning the magnetic fields and the RSOC are addressed systematically. Accordingly, we find bright-to-dark transitions in the electron-hole pairs transition rate spectrum and absorption peak splitting in the optical absorption spectrum tuned by the RSOC interaction. This feature offers us a practical way to detect these band engineering effects especially the exotic spin splitting states by using the conductance and optical technique.
format	article
author	Xiaojing Li Zhenhua Wu Jiangtao Liu
author_facet	Xiaojing Li Zhenhua Wu Jiangtao Liu
author_sort	Xiaojing Li
title	Rashba spin-orbit coupling in graphene monolayer coated by periodic magnetic stripes
title_short	Rashba spin-orbit coupling in graphene monolayer coated by periodic magnetic stripes
title_full	Rashba spin-orbit coupling in graphene monolayer coated by periodic magnetic stripes
title_fullStr	Rashba spin-orbit coupling in graphene monolayer coated by periodic magnetic stripes
title_full_unstemmed	Rashba spin-orbit coupling in graphene monolayer coated by periodic magnetic stripes
title_sort	rashba spin-orbit coupling in graphene monolayer coated by periodic magnetic stripes
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/fe87d21287f24cab8efcc7c8d8104984
work_keys_str_mv	AT xiaojingli rashbaspinorbitcouplingingraphenemonolayercoatedbyperiodicmagneticstripes AT zhenhuawu rashbaspinorbitcouplingingraphenemonolayercoatedbyperiodicmagneticstripes AT jiangtaoliu rashbaspinorbitcouplingingraphenemonolayercoatedbyperiodicmagneticstripes
_version_	1718394964422950912

Rashba spin-orbit coupling in graphene monolayer coated by periodic magnetic stripes

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