Van der Waals engineering of ferromagnetic semiconductor heterostructures for spin and valleytronics.

ABSTRACT: The integration of magnetic material with semiconductors has been fertile ground for fundamental science as well as of great practical interest toward the seamless integration of information processing and storage. We create van der Waals heterostructures formed by an ultrathin ferromagnetic semiconductor CrI₃ and a monolayer of WSe₂. We observe unprecedented control of the spin and valley pseudospin in WSe₂, where we detect a large magnetic exchange field of nearly 13 T and rapid switching of the WSe₂ valley splitting and polarization via flipping of the CrI₃ magnetization. The WSe₂ photoluminescence intensity strongly depends on the relative alignment between photoexcited spins in WSe₂ and the CrI₃ ma

SUBMITTER: Zhong D 

PROVIDER: S-EPMC5451195 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature