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Hysteresis effect due to the exchange Coulomb interaction in short-period superlattices in tilted magnetic fields

Andrei Manolescu·Vidar Gudmundsson
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Abstract

We calculate the ground-state of a two-dimensional electron gas in a short-period lateral potential in magnetic field, with the Coulomb electron-electron interaction included in the Hartree-Fock approximation. For a sufficiently short period the dominant Coulomb effects are determined by the exchange interaction. We find numerical solutions of the self-consistent equations that have hysteresis properties when the magnetic field is tilted and increased, such that the perpendicular component is always constant. This behavior is a result of the interplay of the exchange interaction with the energy dispersion and the spin splitting. We suggest that hysteresis effects of this type could be observable in magneto-transport and magnetization experiments on quantum-wire and quantum-dot superlattices.

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Andrei Manolescu, Vidar Gudmundsson. 2000-02-01. Hysteresis effect due to the exchange Coulomb interaction in short-period superlattices in tilted magnetic fields. https://doi.org/10.1103/physrevb.61.r7858

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