Magnetization of a two-dimensional electron gas with a second filled subband

Abstract

We have measured the magnetization of a dual-subband two-dimensional electron gas, confined in a GaAs/AlGaAs heterojunction. In contrast to two-dimensional electron gases with a single subband, we observe non-1/B-periodic, triangularly shaped oscillations of the magnetization with an amplitude significantly less than $1{\mu }_{\mathrm{B}}^{\ast }$ per electron. All three effects are explained by a field dependent self-consistent model, demonstrating the shape of the magnetization is dominated by oscillations in the confining potential. Additionally, at 1 K, we observe small oscillations at magnetic fields where Landau-levels of the two different subbands cross.

4 pages, 4 figures

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• Resistance Spikes at Transitions between Quantum Hall Ferromagnets
• First-Order Phase Transition in a Quantum Hall Ferromagnet
• The de Haas-van Alphen effect in canonical and grand canonical multiband Fermi liquid
• Ising Quantum Hall Ferromagnet in Magnetically Doped Quantum Wells
• Semi-classical theory of magnetic quantum oscillations in a two-dimensional multiband canonical Fermi liquid
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Cited by in corpus (3)

• Magnetization in two-dimensional electron gas in a perpendicular magnetic field: the roles of edge states and spin-orbit coupling
• Alternative method for the quantitative determination of Rashba- and Dresselhaus spin-orbit interaction using the magnetization
• Measurements of the magnetic properties of conduction electrons