Study of proximity induced SOC and spin injection in graphene - multilayer WSe<sub>2</sub> Van der Waals structures

ORAL

Abstract

Graphene with long electron spin diffusion length (up to 30 µm) has emerged as a promising two dimensional (2D) material for studying spin electronics.1 However, it lacks spin orbit coupling (SOC) in its pristine form which could facilitate electrical manipulation of both charge and spin transport. However, 2D transition metal di-chalcogenides (TMD) like WSe2 have strong SOC which can be placed on top of graphene to investigate proximity-induced SOC in graphene.2 We study such interaction via probing spin transport in graphene encapsulated by multilayer WSe2 (5-10 nm thick) as a function of electrical tuning of charge carrier concentration in graphene and WSe2. Further, spin injection into graphene using WSe2 is demonstrated to understand the nature of interface in order to realize all 2D spin electronics devices.

[1] Marc Drögeler., NanoLett. 16, 3533−3539 (2016).
[2] S. Omar., PRB 95, 081404(R) (2017).
[3] B. N. Madhushankar., Manuscript in preparation.

*1. The European Union Seventh Framework Programme under ‘Graphene Flagship’ (Grant No. 604391)
2. The Dutch Foundation for Fundamental Research on Matter (FOM)
3. Dieptestrategy funding from the Zernike Institute for Advanced Materials.

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Presenters

  • Madhushankar Bettadahalli Nandishaiah

    • Zernike Institute of Advanced Materials, University of Groningen

Authors

  • Madhushankar Bettadahalli Nandishaiah

    • Zernike Institute of Advanced Materials, University of Groningen

  • Siddhartha Omar

    • Zernike Institute of Advanced Materials, University of Groningen

  • Bart Van Wees

    • Univ of Groningen
    • Univ. of Groningen
    • Zernike Institute of Advanced Materials, University of Groningen
    • University of Groningen