Gurevich V L, Muradov M I
Solid State Physics Division, A F Ioffe Institute of Russian Academy of Sciences, 194021 Saint Petersburg, Russia.
J Phys Condens Matter. 2005 Jan 12;17(1):87-98. doi: 10.1088/0953-8984/17/1/009. Epub 2004 Dec 10.
The influence of a longitudinal magnetic field on the Coulomb drag current created in the ballistic transport regime in a quantum well by a ballistic current in a nearby parallel quantum well is investigated. We consider the case where the magnetic field is so strong that the magnetic length a(B) is smaller than the width of the well. Both in the ohmic and non-ohmic case, sharp peaks of the drag current as a function of the gate voltage or chemical potential are predicted. We study the dependence of the drag current on the voltage V across the driving wire, as well as on the magnetic field B. The fine structure of the peaks due to the electron spin is also considered. By studying the Coulomb drag one can make conclusions about the electron spectrum, g-factor and electron-electron interaction in quantum wells.
研究了纵向磁场对附近平行量子阱中的弹道电流在量子阱的弹道输运 regime 中产生的库仑拖曳电流的影响。我们考虑磁场很强以至于磁长度 a(B) 小于阱宽度的情况。在欧姆和非欧姆情况下，均预测了作为栅极电压或化学势函数的拖曳电流的尖锐峰值。我们研究了拖曳电流对驱动线两端电压 V 以及磁场 B 的依赖性。还考虑了由于电子自旋导致的峰值精细结构。通过研究库仑拖曳，可以得出关于量子阱中电子能谱、g 因子和电子 - 电子相互作用的结论。
