Screening, nonadiabaticity, and quantized acoustoelectric current
介观与纳米尺度物理
2007-05-23 v2
摘要
Quantized single-electron transport driven by surface acoustic waves (SAW) through a pinched-off narrow constriction is studied theoretically. Long-range Coulomb interaction causes the tunneling coupling between the two-dimensional electron gas (2DEG) and the moving minimum of the SAW-induced potential to decay rapidly with time. The energy scale, associated with the characteristic time of this decay, controls both the width of the transition regions between the plateaus and the slope of the plateaus. This sets a limit for the accuracy of the quantization of acoustoelectric current at low temperature.
引用
@article{arxiv.cond-mat/9909187,
title = {Screening, nonadiabaticity, and quantized acoustoelectric current},
author = {M. Pustilnik and K. Flensberg and Q. Niu},
journal= {arXiv preprint arXiv:cond-mat/9909187},
year = {2007}
}
备注
Contribution to the Proceedings of the conference on Electron Transport in Mesoscopic Systems (Goeteborg, August 1999)