Spin-valley coupling and spin-relaxation anisotropy in all-CVD Graphene- MoS2 van der Waals heterostructure
Artikel i vetenskaplig tidskrift, 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.
Författare
Anamul Md Hoque
2D-Tech
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Vasudev Ramachandra
Student vid Chalmers
Antony George
Friedrich-Schiller-Universität Jena
Emad Najafidehaghani
Friedrich-Schiller-Universität Jena
Ziyang Gan
Friedrich-Schiller-Universität Jena
Richa Mitra
2D-Tech
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Bing Zhao
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
2D-Tech
Dmitrii Khokhriakov
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Andrey Turchanin
Friedrich-Schiller-Universität Jena
Samuel Lara Avila
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
2D-Tech
Sergey Kubatkin
2D-Tech
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Saroj Prasad Dash
2D-Tech
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Physical Review Materials
24759953 (eISSN)
Vol. 7 4 044005Spinntronik med topologiskt kvantmaterial och magnetisk heterostruktur
Vetenskapsrådet (VR) (2021-04821), 2022-01-01 -- 2025-12-31.
Graphene Core Project 3 (Graphene Flagship)
Europeiska kommissionen (EU) (EC/H2020/881603), 2020-04-01 -- 2023-03-31.
2D material-baserad teknologi för industriella applikationer (2D-TECH)
VINNOVA (2019-00068), 2020-05-01 -- 2024-12-31.
GKN Aerospace Sweden (2D-tech), 2021-01-01 -- 2024-12-31.
Ämneskategorier
Den kondenserade materiens fysik
DOI
10.1103/PhysRevMaterials.7.044005