arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1107.4560cond-mat.mes-hallquant-ph
收藏

强磁场稳定单电子泵

Stabilization of single-electron pumps by high magnetic fields

J. D. Fletcher, M. Kataoka, S. P. Giblin, Sunghun Park, H. -S. Sim, P. See, T. J. B. M. Janssen, J. P. Griffiths, G. A. C. Jones, H. E. Beere, D. A. Ritchie

摘要:

研究了垂直磁场对强含时静电势单电子系统的影响。高分辨率测量揭示了这些电子泵中电流量子化的持续改进。模拟结果表明,隧道速率的势垒电位的敏感性增强,稳定特定的电荷状态。非绝热激发也被抑制,由于福克-达尔文状态的静电势的灵敏度降低。这些效应的组合导致显著更准确的电流量化。

英文摘要:

We study the effect of perpendicular magnetic fields on a single-electron system with a strongly time-dependent electrostatic potential. Continuous improvements to the current quantization in these electron pumps are revealed by high-resolution measurements. Simulations show that the sensitivity of tunnel rates to the barrier potential is enhanced, stabilizing particular charge states. Nonadiabatic excitations are also suppressed due to a reduced sensitivity of the Fock-Darwin states to electrostatic potential. The combination of these effects leads to significantly more accurate current quantization.

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。

↑