Nonlinear response in overlapping and separated Landau levels of GaAs quantum wells

Article

关键词: 2-DIMENSIONAL ELECTRON-GAS;    MAGNETORESISTANCE OSCILLATIONS;    RESISTANCE;    TRANSPORT;   

DOI  :  10.1103/PhysRevB.86.081307

来源: SCIE

【 摘 要 】

We have studied magnetotransport properties of a high-mobility two-dimensional electron system subject to weak electric fields. At low magnetic field B, the differential resistivity acquires a correction delta r alpha - lambda(2)j(2)/B-2, where lambda is the Dingle factor and j is the current density, in agreement with theoretical predictions. At higher magnetic fields, however, delta r becomes B independent, delta r alpha - j(2). While the observed change in behavior can be attributed to a crossover from overlapping to separated Landau levels, full understanding of this behavior remains a subject of future theories.

【 授权许可】

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