Photoinduced spin-Hall resonance in a k3 -Rashba spin-orbit coupled two-dimensional hole system

Ankita Bhattacharya, SK Firoz Islam
2021 Physical review B  
We study the band structure modulation and spin-Hall effect of an irradiated two-dimensional heavy-hole system with k 3 -Rashba spin-orbit coupling. We find that the band structure becomes anisotropic under the illumination by the light. Most remarkably, in the presence of linearly polarized light a pair of additional spin-degeneracy points, apart from the point, emerge in the energy dispersion. The locations of these points are solely determined by the amplitude of the incident light. If this
more » ... egeneracy occurs around the Fermi level, the spin-Hall conductivity exhibits a resonance. Away from the degeneracy points, the light rotates the average spin polarization. The possible effects of k 3 -Dresselhaus spin-orbit coupling are also discussed.
doi:10.1103/physrevb.104.l081411 fatcat:53mibbbcdrdp5kqcusdpmapshq