Intersubband resistance oscillations in crossed electric and magnetic fields

Article

关键词: HIGH FILLING FACTORS;    DOUBLE-QUANTUM-WELL;    SCATTERING;    SYSTEM;    CONDUCTIVITY;   

DOI  :  10.1103/PhysRevB.86.075471

来源: SCIE

【 摘 要 】

Quantum oscillations of nonlinear resistance are investigated in response to electric current and magnetic field applied perpendicular to single GaAs quantum wells with two populated subbands. At small magnetic fields current-induced oscillations appear as Landau-Zener transitions between Landau levels inside the lowest subband. The period of these oscillations is proportional to the magnetic field. At high magnetic fields, a different kind of quantum oscillations emerges with a period that is independent of the magnetic field. At a fixed current the oscillations are periodic in inverse magnetic field with a period that is independent of the dc bias. The proposed model considers these oscillations as a result of spatial variations of the energy separation between two subbands induced by the electric current.

【 授权许可】

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