TY  - JOUR
A1  - Voroshnin, Vladimir
A1  - Tarasov, Artem V.
A1  - Bokai, Kirill A.
A1  - Chikina, Alla
A1  - Senkovskiy, Boris V.
A1  - Ehlen, Niels
A1  - Usachov, Dmitry Yu.
A1  - Gruneis, Alexander
A1  - Krivenkov, Maxim
A1  - Sanchez-Barriga, Jaime
A1  - Fedorov, Alexander
T1  - Direct spectroscopic evidence of magnetic proximity effect in MoS2 monolayer on graphene/Co
T2  - ACS nano
N2  - A magnetic field modifies optical properties and provides valley splitting in a molybdenum disulfide (MoS2) monolayer. 
Here we demonstrate a scalable approach to the epitaxial synthesis of MoS2 monolayer on a magnetic graphene/Co system. 
Using spin- and angle-resolved photoemission spectroscopy we observe a magnetic proximity effect that causes a 20 meV spin-splitting at the (Gamma) over bar point and canting of spins at the (K) over bar point in the valence band toward the in-plane direction of cobalt magnetization. 

Our density functional theory calculations reveal that the in-plane spin component at (K) over bar is localized on Co atoms in the valence band, while in the conduction band it is localized on the MoS2 layer. 
The calculations also predict a 16 meV spin-splitting at the (Gamma) over bar point and 8 meV (K) over bar-(K) over bar' valley asymmetry for an out-of-plane magnetization. These findings suggest control over optical transitions in MoS2 via Co magnetization. Our estimations show that the magnetic proximity effect is equivalent to the action of the magnetic field as large as 100 T.
KW  - magnetic proximity effect
KW  - MoS2
KW  - monolayer
KW  - graphene
KW  - spin-resolved
KW  - ARPES
Y1  - 2022
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/64180
SN  - 1936-0851
SN  - 1936-086X
VL  - 16
IS  - 5
SP  - 7448
EP  - 7456
PB  - American Chemical Society
CY  - Washington
ER  -