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

Article

关键词: 2-DIMENSIONAL ELECTRON-SYSTEM;    LATERAL MODULATION;    SPIN-POLARIZATION;    EDGE STATES;   

DOI  :  10.1103/PhysRevB.61.R7858

来源: SCIE

【 摘 要 】

We calculate the ground state of a two-dimensional electron gas in a shea-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 magnetotransport and magnetization experiments on quantum-wire and quantum-dot superlattices.

【 授权许可】

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