Single-parameter non-adiabatic quantized charge pumping

Autor:	Kaestner, B., Kashcheyevs, V., Amakawa, S., Li, L., Blumenthal, M. D., Janssen, T. J. B. M., Hein, G., Pierz, K., Weimann, T., Siegner, U., Schumacher, H. W.
Rok vydání:	2007
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Physical Review B 77, 153301 (2008)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.77.153301
Popis:	Controlled charge pumping in an AlGaAs/GaAs gated nanowire by single-parameter modulation is studied experimentally and theoretically. Transfer of integral multiples of the elementary charge per modulation cycle is clearly demonstrated. A simple theoretical model shows that such a quantized current can be generated via loading and unloading of a dynamic quasi-bound state. It demonstrates that non-adiabatic blockade of unwanted tunnel events can obliterate the requirement of having at least two phase-shifted periodic signals to realize quantized pumping. The simple configuration without multiple pumping signals might find wide application in metrological experiments and quantum electronics. Comment: 4 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0707.0993 Zobrazit plný text záznamu View this record from Arxiv