Persistent spin helices in 2D electron systems

18th Russian Youth Conference on Physics of Semiconductors and Nanostructures, Opto- and Nanoelectronics

Kozulin, A.S.^1 ; Malyshev, A.I.^1 ; Konakov, A.A.^1

Department of Theoretical Physics, National Research Lobachevsky, State University of Nizhni Novgorod, 23 Gagarin Avenue, Nizhni Novgorod

603950, Russia^1

关键词: 2D electron system;    Crystallographic directions;    Effective mass;    Growth directions;    Single particle;    Spin-orbit couplings;    Theoretical investigations;    Two-dimensional electron system;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/816/1/012023/pdf
DOI  :  10.1088/1742-6596/816/1/012023

来源: IOP

【 摘 要 】

We present a theoretical investigation of persistent spin helices in two-dimensional electron systems with spin-orbit coupling. For this purpose, we consider a single-particle effective mass Hamiltonian with a generalized linear-in- k spin-orbit coupling term corresponding to a quantum well grown in an arbitrary crystallographic direction, and derive the general condition for the formation of the persistent spin helix. This condition applied for the Hamiltonians describing quantum wells with different growth directions indicates the possibility of existence of the persistent spin helix in a wide class of 2D systems apart from the [001] model with equal Rashba and Dresselhaus spin-orbit coupling strengths and the [110] Dresselhaus model.