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Optical spin pumping induced pseudo-magnetic field in two dimensional heterostructures

Authors :
Jiang, Chongyun
Rasmita, Abdullah
Xu, Weigao
Imamoğlu, Atac
Xiong, Qihua
Gao, Wei-bo
Source :
Phys. Rev. B 98, 241410 (2018)
Publication Year :
2018

Abstract

Two dimensional heterostructures are likely to provide new avenues for the manipulation of magnetization that is crucial for spintronics or magnetoelectronics. Here, we demonstrate that optical spin pumping can generate a large effective magnetic field in two dimensional MoSe2/WSe2 heterostructures. We determine the strength of the generated field by polarization-resolved measurement of the interlayer exciton photoluminescence spectrum: the measured splitting exceeding 10 milli-electron volts (meV) between the emission originating from the two valleys corresponds to an effective magnetic field of ~ 30 T. The strength of this optically induced field can be controlled by the excitation light polarization. Our finding opens up new possibilities for optically controlled spintronic devices based on van der Waals heterostructures.

Details

Database :
arXiv
Journal :
Phys. Rev. B 98, 241410 (2018)
Publication Type :
Report
Accession number :
edsarx.1804.00282
Document Type :
Working Paper
Full Text :
https://doi.org/10.1103/PhysRevB.98.241410