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 044005Spintronics 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