Magnetization in two-dimensional electron gas in a perpendicular magnetic field: the roles of edge states and spin-orbit coupling

Abstract

We study the de Haas--van Alphen (dHvA) oscillations in the magnetization of a two-dimensional electron gas (2DEG) under the influence of the edge states and/or the Rashba spin-orbit interaction (SOI). The boundaries of the systems lift partially the degeneracies of Landau levels (LL's) and the resulting edge states lead to the changes of both the center and the amplitude of the sawtoothlike magnetization oscillation. The SOI mixes the spin-up and spin-down states of neighboring LL's into two unequally spaced energy branches. The inclusion of SOI changes the well-defined sawtooth pattern of the dHvA oscillations in the magnetization. The weaker the magnetic field is, the larger is the change of the dHvA oscillations due to the edge effect and/or the spin-orbit coupling. Some theoretical results are compared with the experimental data.

9 pages, 9 figures

References in corpus (7)

• Metal-insulator transition in two-dimensional electron systems
• Resonant Spin Hall Conductance in Two-Dimensional Electron Systems with Rashba Interaction in a Perpendicular Magnetic Field
• Pauli spin susceptibility of a strongly correlated two-dimensional electron liquid
• Theory of Edge States in Systems with Rashba Spin-Orbit Coupling
• Magnetization of a strongly interacting two-dimensional electron system in perpendicular magnetic fields
• Magnetization of a two-dimensional electron gas with a second filled subband
• Conserved spin Hall conductance in two dimensional electron gas in a perpendicular magnetic field

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• In-plane electric field effect on a spin-orbit coupled two-dimensional electron system in presence of magnetic field
• A general formulation for the magnetic oscillations in two dimensional systems
• Quenching of the DOS beats in a two-dimensional electron gas in tilted magnetic fields
• Integer effects in the entanglement and spin fluctuations of a quantum Hall system with Rashba interactions
• Modulation effect on the spin Hall resonance