Spontaneous spin-valley polarization in NbSe₂ at a van der Waals interface.

ABSTRACT: A proximity effect at a van der Waals (vdW) interface enables creation of an emergent quantum electronic ground state. Here we demonstrate that an originally superconducting two-dimensional (2D) NbSe₂ forms a ferromagnetic ground state with spontaneous spin polarization at a vdW interface with a 2D ferromagnet V₅Se₈. We investigated the anomalous Hall effect (AHE) of the NbSe₂/V₅Se₈ magnetic vdW heterostructures, and found that the sign of the AHE was reversed as the number of the V₅Se₈ layer was thinned down to the monolayer limit. Interestingly, the AHE signal of those samples was enhanced with the in-plane magnetic fields, suggesting an additional contribution to the AHE signal other than magnetizati

SUBMITTER: Matsuoka H 

PROVIDER: S-EPMC9477796 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature