Single- and few-electron dynamic quantum dots in a perpendicular magnetic field
arXiv:1009.0203 · doi:10.1063/1.3578685
Abstract
We present experimental studies of the current pumped through a dynamic quantum dot over a wide range of magnetic fields. At low fields we observe repeatable structure indicating increased confinement of the electrons in the dynamic dot. At higher fields (B>3T), we observe structure which changes markedly from device to device suggesting that in this regime the transport is sensitive to local disorder. The results are significant for the development of dynamic quantum dot pumps as quantum standards of electrical current.
5 pages, 4 figures, submitted to J. Appl. Phys. as an invited paper for ICPS-30, 25th-30th July, Seoul, SK
References in corpus (13)
- Single-parameter non-adiabatic quantized charge pumping
- Universal decay cascade model for dynamic quantum dot initialization
- Periodic and Aperiodic Bunching in the Addition Spectra of Quantum Dot
- Robust single-parameter quantized charge pumping
- Parallel pumping of electrons
- Single-parameter quantized charge pumping in high magnetic fields
- Accurate high speed single-electron quantum dot preparation
- Enhanced current quantization in high frequency electron pumps in a perpendicular magnetic field
- Localization in Artificial Disorder - Two Coupled Quantum Dots
- Parallel quantized charge pumping
- Two-electron state in a disordered 2D island: pairing caused by the Coulomb repulsion
- Pair Tunneling in Semiconductor Quantum Dots
- Disorder and interaction induced pairing in the addition spectra of quantum dots
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- Non-adiabatic quantized charge pumping with tunable-barrier quantum dots: a review of current progress
- Stabilization of single-electron pumps by high magnetic fields
- Single-electron source: Adiabatic versus non-adiabatic emission
- Non-adiabatic single-electron pump in a dopant-free GaAs/AlGaAs 2DEG
- Numerical Simulation of Quantized Current Generated by a Quantum Dot Pump