Disorder and Interaction-Induced Pairing in the Addition Spectra of Quantum Dots

C. M. Canali
2000 Physical Review Letters  
We have investigated numerically the electron addition spectra in quantum dots containing a small number (N < 11) of interacting electrons, in presence of strong disorder. For a short-range Coulomb repulsion, we find regimes in which two successive electrons enter the dot at very close values of the chemical potential. In the strongly correlated regime these close additions, or pairing, are associated with electrons tunneling into distinct electron puddles within the dot. We discuss the
more » ... g rates at pairing, and we argue that our results are related to a phenomenon known as "bunching", recently observed experimentally.
doi:10.1103/physrevlett.84.3934 pmid:11019243 fatcat:7x4wocitqfhxfgtaf4zscdeujy