Spin energy enhanced by exchange interaction in a Rashba spintronic system in quantizing magnetic fields

Date

2008-01-14

Authors

Yang, C. H.
Xu, W.

Journal Title

Journal ISSN

Volume Title

Publisher

American Institute of Physics (AIP)

Abstract

Using the standard Hartree-Fock approximation on the basis of the random-phase approximation, we calculate the self-energy induced by exchange scattering due to electron-electron interaction in a spin-polarized two-dimensional electron gas(2DEG) system. Applying the exchange self-energy to a Green’s function approach, we examine how the exchange interaction affects the spin-splitting in a 2DEG with the Rashba spin-orbit interaction and Zeeman spin-splitting in the presence of quantizing magnetic fields. It is demonstrated that such a many-body interaction can lower the energy levels of the system and enhance significantly the spin-splitting around the Fermi level. We also find that the exchange-enhanced spin-splitting is achieved mainly via intra-Landau-level scattering channels and the spin energy oscillates with the magnetic fields.

Description

Keywords

Keywords: Approximation theory; Electron-electron interactions; Fermi level; Green's function; Magnetic variables measurement; Random processes; Two dimensional electron gas; Intra Landau level scattering channels; Random phase approximation; Magnetoelectronics

Citation

Source

Journal of Applied Physics

Type

Journal article

Book Title

Entity type

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DOI

10.1063/1.2828175

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