Eur. Phys. J. B (2012) 85: 367
https://doi.org/10.1140/epjb/e2012-30534-y

Regular Article

Two-dimensional Fröhlich polaron with Rashba and Dresselhaus spin-orbit coupling

Department of Solid State Physics, Yerevan State University, Al. Manoogian 1, 0025 Yerevan, Armenia

^a e-mail: vardan@ysu.am

Received: 27 July 2012
Received in final form: 2 September 2012
Published online: 8 November 2012

Abstract

We investigate the simultaneous effect of Rashba and Dresselhaus spin-orbit interactions on the formation of Fröhlich polarons in two-dimensional semiconductors in weak electron-phonon coupling approximation. The results illustrate that the spin-orbit coupling terms may significantly affect the polaron properties. We show that in the presence of both SO coupling terms the self-energy correction of the electron energy as well as the polaron effective mass exhibit an angular anisotropy unlike the case when only one of the spin-orbit coupling terms (Rashba or Dresselhaus) is considered. The simultaneous consideration of the Rashba and Dresselhaus mechanisms shows that polaronic effect may become either stronger or weaker depending on directions, a phenomenon which does not occur when the spin-orbit interaction is not taken into account.