Commensurability resonances in two-dimensional magnetoelectric lateral superlattices

Article

关键词: PERIODIC MAGNETIC-FIELD;    ELECTRON-GAS;    MAGNETORESISTANCE OSCILLATIONS;    MAGNETOTRANSPORT;    ORBITS;    TRANSPORT;    ARRAY;   

DOI  :  10.1103/PhysRevB.91.195303

来源: SCIE

【 摘 要 】

Hybrid lateral superlattices composed of a square array of antidots and a periodic one-dimensional magnetic modulation are prepared in Ga[Al]As heterostructures. The two-dimensional electron gases exposed to these superlattices are characterized by magnetotransport experiments in vanishing average perpendicular magnetic fields. Despite the absence of closed orbits, the diagonal magnetoresistivity in the direction perpendicular to the magnetic modulation shows pronounced classical resonances. They are located at magnetic fields where snake trajectories exist which are quasicommensurate with the antidot lattice. The diagonal magnetoresistivity in the direction of the magnetic modulation increases sharply above a threshold magnetic field and shows no fine structure. The experimental results are interpreted with the help of numerical simulations based on the semiclassical Kubo model.

【 授权许可】

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