Electrically controlled spin polarized current in Dirac semimetals

Abstract We propose a highly tunable $$100\%$$ 100 % spin-polarized current generated in a spintronic device based on a Dirac semimetal (DSM) under a magnetic field, which can be achieved merely by controlling electrical parameters, i.e. the gate voltage, the chemical potential in the lead and the c...

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Main Authors:	Qianqian Lv, Pei-Hao Fu, Xiang-Long Yu, Jun-Feng Liu, Jiansheng Wu
Format:	article
Language:	EN
Published:	Nature Portfolio 2021
Subjects:	Medicine R Science Q
Online Access:	https://doaj.org/article/29c14ed2ee3b44b890e01c8fe4f6605c
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spelling	oai:doaj.org-article:29c14ed2ee3b44b890e01c8fe4f6605c2021-11-08T10:47:57ZElectrically controlled spin polarized current in Dirac semimetals10.1038/s41598-021-01067-y2045-2322https://doaj.org/article/29c14ed2ee3b44b890e01c8fe4f6605c2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01067-yhttps://doaj.org/toc/2045-2322Abstract We propose a highly tunable $$100\%$$ 100 % spin-polarized current generated in a spintronic device based on a Dirac semimetal (DSM) under a magnetic field, which can be achieved merely by controlling electrical parameters, i.e. the gate voltage, the chemical potential in the lead and the coupling strength between the leads and the DSM. These parameters are all related to the special properties of a semimetal. The spin polarized current generated by gate voltage is guaranteed by its semimetallic feature, because of which the density of state vanishes near Dirac nodes. The barrier controlled current results from the different distance of Weyl nodes generated by the Zeeman field. And the coupling strength controlled spin polarized current originates from the surface Fermi arcs. This DSM-based spintronic device is expected to be realized in $$\hbox {Cd}_{3}\hbox {As}_{2}$$ Cd 3 As 2 experimentally.Qianqian LvPei-Hao FuXiang-Long YuJun-Feng LiuJiansheng WuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Qianqian Lv Pei-Hao Fu Xiang-Long Yu Jun-Feng Liu Jiansheng Wu Electrically controlled spin polarized current in Dirac semimetals
description	Abstract We propose a highly tunable $$100\%$$ 100 % spin-polarized current generated in a spintronic device based on a Dirac semimetal (DSM) under a magnetic field, which can be achieved merely by controlling electrical parameters, i.e. the gate voltage, the chemical potential in the lead and the coupling strength between the leads and the DSM. These parameters are all related to the special properties of a semimetal. The spin polarized current generated by gate voltage is guaranteed by its semimetallic feature, because of which the density of state vanishes near Dirac nodes. The barrier controlled current results from the different distance of Weyl nodes generated by the Zeeman field. And the coupling strength controlled spin polarized current originates from the surface Fermi arcs. This DSM-based spintronic device is expected to be realized in $$\hbox {Cd}_{3}\hbox {As}_{2}$$ Cd 3 As 2 experimentally.
format	article
author	Qianqian Lv Pei-Hao Fu Xiang-Long Yu Jun-Feng Liu Jiansheng Wu
author_facet	Qianqian Lv Pei-Hao Fu Xiang-Long Yu Jun-Feng Liu Jiansheng Wu
author_sort	Qianqian Lv
title	Electrically controlled spin polarized current in Dirac semimetals
title_short	Electrically controlled spin polarized current in Dirac semimetals
title_full	Electrically controlled spin polarized current in Dirac semimetals
title_fullStr	Electrically controlled spin polarized current in Dirac semimetals
title_full_unstemmed	Electrically controlled spin polarized current in Dirac semimetals
title_sort	electrically controlled spin polarized current in dirac semimetals
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/29c14ed2ee3b44b890e01c8fe4f6605c
work_keys_str_mv	AT qianqianlv electricallycontrolledspinpolarizedcurrentindiracsemimetals AT peihaofu electricallycontrolledspinpolarizedcurrentindiracsemimetals AT xianglongyu electricallycontrolledspinpolarizedcurrentindiracsemimetals AT junfengliu electricallycontrolledspinpolarizedcurrentindiracsemimetals AT jianshengwu electricallycontrolledspinpolarizedcurrentindiracsemimetals
_version_	1718442600214560768

Electrically controlled spin polarized current in Dirac semimetals

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