2014/09/22 by M. Tahir, A. Manchon, Aurélien Manchon +2
Engineering · Materials Science · Physics and Astronomy · #2D Materials and Applications #Condensed matter physics #Electron #Graphene research and applications #Magnetic field #Magnetization #Materials science #Monolayer #Nanotechnology #Perovskite Materials and Applications #Physics #Quantum mechanics #Spin (aerodynamics) #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.90.125438
published as Phys. Rev. B 90, 125438 (2014) · 10 pages and 2 figs
openalex publication_date 2014/09/22 · arxiv created 2015/04/18 · arxiv updated 2015/04/21 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.