Impact of Dresselhaus vs. Rashba spin-orbit coupling on the Holstein polaron

Details Impact of Dresselhaus vs. Rashba spin-orbit coupling on the Holstein polaron Impact of Dresselhaus vs. Rashba spin-orbit coupling on the Holstein polaron

2012-03-13

arxiv.org/abs/1203.2795v1

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, low resolution figures

Scientific paper

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.

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