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Exchange-enhanced spin-splitting in a two-dimensional electron gas in the presence of the Rashba spin–orbit interaction |
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| Authors: | C.H. Yang W. Xu Z. Zeng C.S. Tang C. Zhang |
| Affiliation: | aKey Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;bDepartment of Theoretical Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra ACT 0200, Australia;cPhysics Division, National Center for Theoretical Sciences, P.O. Box 2-131, Hsinchu 30013, Taiwan;dSchool of Physics, University of Wollongong, Wollongong NSW 2522, Australia |
| Abstract: | We present a theoretical study on how many-body effects can affect the spin-splitting of a two-dimensional electron gas in the presence of the Rashba spin–orbit interaction. The standard Hartree–Fock approximation and Green's function approach are employed to calculate the energy spectrum and density of states of a spin-split two-dimensional electron gas (2DEG). We find that the presence of the exchange interaction can enhance significantly the spin-splitting of a 2DEG on top of the Rashba effect. The physical reasons behind this important phenomenon are discussed. |
| Keywords: | Spin– orbit interaction Two-dimensional electron gas Rashba effect Exchange interaction |
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