Energy-dependent tunneling from few-electron dynamic quantum dots |
| |
Authors: | Astley M R Kataoka M Ford C J B Barnes C H W Anderson D Jones G A C Farrer I Ritchie D A Pepper M |
| |
Institution: | Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom. |
| |
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 ( approximately a few meV) is comparable to those in static QDs as expected. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|