Tunneling of electrons traversing a few-electron quantum dot is strongly influenced by the Coulomb interaction leading to Coulomb blockade effects and single-electron tunneling. We present calculations which demonstrate that correlations between the electrons cause a strong suppression of most of the energetically allowed tunneling processes involving excited dot states. The excitation of center-of-mass modes, in contrast, is unaffected by the Coulomb interaction. Therefore, channels connected to these modes dominate the excitation spectra in transport measurements.
@article{arxiv.cond-mat/9510092,
title = {Selection Rules for Transport Excitation Spectroscopy of Few-Electron Quantum Dots},
author = {Daniela Pfannkuche and Sergio E. Ulloa},
journal= {arXiv preprint arXiv:cond-mat/9510092},
year = {2009}
}
Comments
REVTEX manuscript with 3 Figures included in uu file. Published in Phys. Rev. Lett. 74, 1194--1197 (1995)