Effects of screening on the Hofstadter butterfly

Article

关键词: DIMENSIONAL ELECTRON-GAS;    UNIDIRECTIONAL PERIODIC MODULATION;    CENTER-DRIFT RESONANCE;    MAGNETORESISTANCE OSCILLATIONS;    QUANTUM MAGNETOTRANSPORT;    BLOCH ELECTRONS;    MAGNETIC-FIELDS;    SYSTEMS;    SUPERLATTICES;    SPECTRUM;   

DOI  :  10.1103/PhysRevB.52.16744

来源: SCIE

【 摘 要 】

We study, within the Hartree approximation, the effects of the electron-electron interaction on the energy spectrum of a two-dimensional electron gas in a perpendicular homogeneous magnetic field and a lateral superlattice potential with square symmetry. Due to the strong screening effects, the bandwidth of the Landau bands oscillates strongly with their filling. For short enough periods and strong enough modulation of the superlattice potential, the miniband structure of the Landau bands can be resolved in the thermodynamic density of states.

【 授权许可】

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