Regensburg 2025 – scientific programme
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MA: Fachverband Magnetismus
MA 41: Poster III
MA 41.9: Poster
Thursday, March 20, 2025, 15:00–17:30, P3
Interplay of valley and spin at the interface of MnPS3|WS2 heterostructure — •Purba Dutta and Nirmal Ganguli — Indian Institute of Science Education and Research Bhopal, MP, India
This work is focused on the proximity-induced effects of the MnPS3|WS2 heterostructure, particularly on the change of valley and spin splitting in some high symmetry points under the effect of SOC, exhibits a unique interplay of electronic, spintronic, and valleytronic properties due to its type-II band alignment and strong spin-orbit coupling. This heterostructure facilitates efficient charge separation, driven by the staggered band alignment, making it ideal for optoelectronic applications such as spin-polarized photodetectors. The magnetic proximity effect from MnPS* induces a tunable U-dependent Rashba spin-splitting at the interface, where the magnitude of the Rashba effect can be controlled by the on-site Coulomb interaction parameter (U). This coupling enables robust control over spin texture and spin-dependent transport. Moreover, circularly polarized light selectively excites carriers in the distinct valleys of WS2, leading to enhanced valley polarization, further modulated by the magnetic exchange interaction from MnPS3 . This synergy between Rashba like effect-induced spin textures and valley polarization creates a platform for multifunctional optospintronic devices, offering avenues for tunable spin and valley-selective photodetection, spin filters. The Interplay of valley and spin at the interface of MnPS3|WS2 heterostructure heterostructure thus provides a versatile framework for advancing spintronic and valleytronic technologies.
Keywords: Proximity effect, spin-splitting, valley