Astley, MR and Kataoka, M and Ford, CJB and Barnes, CHW and Anderson, D and Jones, GAC and Farrer, I and Ritchie, DA and Pepper, M (2007) Energy-dependent tunneling from few-electron dynamic quantum dots. PHYS REV LETT , 99 (15) , Article 156802. 10.1103/PhysRevLett.99.156802.
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Abstract
We measure the electron escape rate from surface-acoustic-wave dynamic quantum dots (QDs) through a tunnel barrier. Rate equations are used to extract the tunneling rates, which change by an order of magnitude with tunnel-barrier-gate voltage. We find that the tunneling rates depend on the number of electrons in each dynamic QD because of Coulomb energy. By comparing this dependence to a saddle-point-potential model, the addition energies of the second and third electron in each dynamic QD are estimated. The scale (similar to a few meV) is comparable to those in static QDs as expected.
| Type: | Article |
|---|---|
| Title: | Energy-dependent tunneling from few-electron dynamic quantum dots |
| Open access status: | An open access publication. A version is also available from UCL Discovery. |
| DOI: | 10.1103/PhysRevLett.99.156802 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.99.156802 |
| Language: | English |
| Additional information: | © 2007 The American Physical Society |
| Keywords: | SURFACE ACOUSTIC-WAVES, SPIN, SPECTROSCOPY, COMPUTATION, TRANSPORT, CHANNEL |
| UCL classification: | UCL > School of BEAMS > Faculty of Engineering Science > Electronic and Electrical Engineering |
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