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arXiv 1206.5233cond-mat.mes-hall
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交叉电场和磁场中的子带间电阻振荡

Inter-subband resistance oscillations in crossed electric and magnetic fields

Scott Dietrich, Sean Byrnes, Sergey Vitkalov, A. V. Goran, A. A. Bykov

摘要:

研究了垂直于单GaAs量子阱的电流和磁场作用下非线性电阻的量子振荡。在小磁场下,电流引起的振荡表现为最低子带内朗道能级之间的朗道-齐纳跃迁。这些振荡的周期与磁场成正比。在高磁场下,不同类型的量子振荡以一个周期出现,该周期与磁场无关。在固定电流下,振荡在逆磁场中是周期性的,其周期与直流偏置无关。所提出的模型认为,这些振荡的空间变化的结果引起的电流的两个子带之间的能量分离。

英文摘要:

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. Period of these oscillations is proportional to the magnetic field. At high magnetic fields different kind of quantum oscillations emerges with a period,which 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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