Tracking electron pathways with magnetic field: Aperiodic Aharonov-Bohm oscillations in coherent transport through a periodic array of quantum dots

Article

关键词: MAGNETORESISTANCE OSCILLATIONS;    INTERFERENCE;    PHASE;    MAGNETOTRANSPORT;    ORBITS;    GAS;    H/E;   

DOI  :  10.1103/PhysRevB.91.045405

来源: SCIE

【 摘 要 】

We study resonant tunneling through a periodic square array of quantum dots sandwiched between modulation-doped quantum wells. If a magnetic field is applied parallel to the quantum dot plane, the tunneling current exhibits a highly complex Aharonov-Bohm oscillation pattern due to the interference of multiple pathways traversed by a tunneling electron. Individual pathways associated with conductance beats can be enumerated by sweeping the magnetic field at various tilt angles. Remarkably, Aharonov-Bohm oscillations are aperiodic unless the magnetic field slope relative to the quantum dot lattice axes is a rational number.

【 授权许可】

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