Photo-modulation of the spin Hall conductivity of mono-layer transition metal dichalcogenides
Abstract
We report on a possible optical tuning of the spin Hall conductivity in mono-layer transition metal dichalcogenides. Light beams of frequencies much higher than the energy scale of the system (the off-resonant condition) do not excite electrons but rearrange the band structure. The rearrangement is quantitatively established using the Floquet formalism. For such a system of mono-layer transition metal dichalcogenides, the spin Hall conductivity (calculated with the Kubo expression in presence of disorder) exhibits a drop at higher frequencies and lower intensities. Finally, we compare the spin Hall conductivity of the higher spin-orbit coupled WSe2 to MoS2; the spin Hall conductivity of WSe2 was found to be larger.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 23, 2016
- Source ID
- 10.1063/1.4952722
Entities
People
- E. Bellotti
- Parijat Sengupta
Organizations
- Boston University
- United States Army Research Laboratory