Spin-valley coupling and spin-relaxation anisotropy in all-CVD Graphene- MoS2 van der Waals heterostructure
Journal article, 2023

Two-dimensional (2D) van der Waals (vdW) heterostructures fabricated by combining 2D materials with unique properties into one ultimate unit can offer a plethora of fundamental phenomena and practical applications. Recently, proximity-induced quantum and spintronic effects have been realized in heterostructures of graphene (Gr) with 2D semiconductors and their twisted systems. However, these studies are so far limited to exfoliated flake-based devices, limiting their potential for scalable practical applications. Here, we report spin-valley coupling and spin-relaxation anisotropy in Gr-MoS2 heterostructure devices prepared from scalable chemical vapor-deposited (CVD) 2D materials. Spin precession and dynamics measurements reveal an enhanced spin-orbit coupling strength in the Gr-MoS2 heterostructure in comparison with pristine Gr at room temperature. Consequently, large spin-relaxation anisotropy is observed in the heterostructure, providing a method for spin filtering due to spin-valley coupling. These findings open a scalable platform for all-CVD 2D vdW heterostructures design and their device applications.

Author

Anamul Md Hoque

2D-Tech

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Vasudev Ramachandra

Student at Chalmers

Antony George

Friedrich Schiller University Jena

Emad Najafidehaghani

Friedrich Schiller University Jena

Ziyang Gan

Friedrich Schiller University Jena

Richa Mitra

2D-Tech

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Bing Zhao

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

2D-Tech

Dmitrii Khokhriakov

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Andrey Turchanin

Friedrich Schiller University Jena

Samuel Lara Avila

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

2D-Tech

Sergey Kubatkin

2D-Tech

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Saroj Prasad Dash

2D-Tech

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Physical Review Materials

24759953 (eISSN)

Vol. 7 4 044005

Spintronics with Topological Quantum Material and Magnetic Heterostructures

Swedish Research Council (VR) (2021-04821), 2022-01-01 -- 2025-12-31.

Graphene Core Project 3 (Graphene Flagship)

European Commission (EC) (EC/H2020/881603), 2020-04-01 -- 2023-03-31.

2D material-based technology for industrial applications (2D-TECH)

VINNOVA (2019-00068), 2020-05-01 -- 2024-12-31.

GKN Aerospace Sweden (2D-tech), 2021-01-01 -- 2024-12-31.

Subject Categories

Condensed Matter Physics

DOI

10.1103/PhysRevMaterials.7.044005

More information

Latest update

2/12/2024