Single-parameter nonadiabatic quantized charge pumping

2007/07/06 by B. Kaestner, V. Kashcheyevs, Vyacheslavs Kashcheyevs +11 · 5 citations
Engineering · Physics and Astronomy · #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #Semiconductor materials and devices #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.77.153301

published as Physical Review B 77, 153301 (2008) · 4 pages, 4 figures

arxiv created 2007/07/06 · openalex publication_date 2008/04/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

Controlled charge pumping in an AlGaAs∕GaAs gated nanowire by single-parameter modulation is experimentally and theoretically studied. 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 quasibound state. It demonstrates that nonadiabatic blockade of unwanted tunnel events can obliterate the requirement of having at least two phase-shifted periodic signals to realize quantized pumping.

Citations

• Driven quantum transport on the nanoscale
• Nonadiabaticity and single-electron transport driven by surface acoustic waves

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