Experimental evidence for Coulomb charging effects in an open quantum dot at zero magnetic field
Journal
Physical Review Letters
Journal Volume
81
Journal Issue
16
Pages
3507-3510
Date Issued
1998
Author(s)
Abstract
We have measured the low-temperature transport properties of an open quantum dot formed in a clean one-dimensional channel. For the first time, at zero magnetic field, continuous and periodic oscillations superimposed upon ballistic conductance steps are observed when the conductance through the dot $G$ exceeds ${2e}^{2}/h$. We ascribe the observed conductance oscillations to evidence for Coulomb charging effects in an open dot. This is supported by the evolution of the oscillating features for $G>{2e}^{2}/h$ as a function of both temperature and barrier transparency.
Type
journal article