Photoinduced quantum spin and valley Hall effects, and orbital magnetization in monolayer MoS2
Type
ArticleKAUST Department
Computational Physics and Materials Science (CPMS)Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Spintronics Theory Group
Date
2014-09-22Preprint Posting Date
2015-04-18Permanent link to this record
http://hdl.handle.net/10754/346749
Metadata
Show full item recordAbstract
We theoretically demonstrate that 100% valley-polarized transport in monolayers of MoS2 and other group-VI dichalcogenides can be obtained using off-resonant circularly polarized light. By tuning the intensity of the off-resonant light the intrinsic band gap in one valley is reduced, while it is enhanced in the other valley, enabling single valley quantum transport. As a consequence, we predict (i) enhancement of the longitudinal electrical conductivity, accompanied by an increase in the spin polarization of the flowing electrons, (ii) enhancement of the intrinsic spin Hall effect, together with a reduction of the intrinsic valley Hall effect, and (iii) enhancement of the orbital magnetic moment and orbital magnetization. These mechanisms provide appealing opportunities to the design of nanoelectronics based on dichalcogenides.Citation
Photoinduced quantum spin and valley Hall effects, and orbital magnetization in monolayer MoS2, 2014, 90 (12) Physical Review BPublisher
American Physical Society (APS)Journal
Physical Review BarXiv
1504.04771ae974a485f413a2113503eed53cd6c53
10.1103/PhysRevB.90.125438