Impact of Dresselhaus vs. Rashba spin-orbit coupling on the Holstein polaron
arXiv:1203.2795 · doi:10.1103/PhysRevB.85.205112
Abstract
We utilize an exact variational numerical procedure to calculate the ground state properties of a polaron in the presence of Rashba and linear Dresselhaus spin-orbit coupling. We find that when the linear Dresselhaus spin-orbit coupling approaches the Rashba spin-orbit coupling, the Van-Hove singularity in the density of states will be shifted away from the bottom of the band and finally disappear when the two spin-orbit couplings are tuned to be equal. The effective mass will be suppressed; the trend will become more significant for low phonon frequency. The presence of two dominant spin-orbit couplings will make it possible to tune the effective mass with more varied observables.
6 pages, low resolution figures
References in corpus (10)
- Many-Body Physics with Ultracold Gases
- An Exact SU(2) Symmetry and Persistent Spin Helix in a Spin-Orbit Coupled System
- Emergence of the persistent spin helix in semiconductor quantum wells
- Measurement of Rashba and Dresselhaus spin-orbit magnetic fields
- Green's function of a dressed particle
- Topological Change of the Fermi Surface in Low Density Rashba Gases: Application to Superconductivity
- Ground state properties of the Holstein model near the adiabatic limit
- Electron-phonon effects on spin-orbit split bands of two dimensional systems
- Spin-Hall Conductivity in Electron-Phonon Coupled Systems
- Impact of spin-orbit coupling on the Holstein polaron