All-electrical creation and control of spin-galvanic signal in graphene and molybdenum ditelluride heterostructures at room temperature

URN to cite this document:

urn:nbn:de:bvb:355-epub-478002 Copy

DOI to cite this document:

10.5283/epub.47800 Copy

Hoque, Anamul Md. ; Khokhriakov, Dmitrii ; Zollner, Klaus ; Zhao, Bing ; Karpiak, Bogdan ; Fabian, Jaroslav ; Dash, Saroj P.

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Date of publication of this fulltext: 10 Aug 2021 10:59

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Details

Item type:	Article
Journal or Publication Title:	Communications Physics
Publisher:	Springer Nature
Volume:	4
Number of Issue or Book Chapter:	1
Page Range:	p. 124
Date:	8 June 2021
Institutions:	Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Jaroslav Fabian
Projects:	SFB 1277: Emergente relativistische Effekte in der Kondensierten Materie: Von grundlegenden Aspekten zu elektronischer Funktionalität, SPP 2244, European Union´s Horizon 2020 (Graphene Flagship)
Identification Number:	Value Type 10.1038/s42005-021-00611-6 DOI
Keywords:	Magnetic devices, Spintronics
Dewey Decimal Classification:	500 Science > 530 Physics
Status:	Published
Refereed:	Yes, this version has been refereed
Created at the University of Regensburg:	Partially
Item ID:	47800

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Abstract

The ability to engineer new states of matter and control their spintronic properties by electric fields is at the heart of future information technology. Here, we report a gate-tunable spin-galvanic effect in van der Waals heterostructures of graphene with a semimetal of molybdenum ditelluride at room temperature due to an efficient spin-charge conversion process. Measurements in different device ...

Abstract

The ability to engineer new states of matter and control their spintronic properties by electric fields is at the heart of future information technology. Here, we report a gate-tunable spin-galvanic effect in van der Waals heterostructures of graphene with a semimetal of molybdenum ditelluride at room temperature due to an efficient spin-charge conversion process. Measurements in different device geometries with control over the spin orientations exhibit spin-switch and Hanle spin precession behavior, confirming the spin origin of the signal. The control experiments with the pristine graphene channels do not show any such signals. We explain the experimental spin-galvanic signals by theoretical calculations considering the spin-orbit induced spin-splitting in the bands of the graphene in the heterostructure. The calculations also reveal an unusual spin texture in graphene heterostructure with an anisotropic out-of-plane and in-plane spin polarization. These findings open opportunities to utilize graphene-based heterostructures for gate-controlled spintronic devices.

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Metadata last modified: 29 Sep 2021 07:42

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