Theoretical and experimental investigations of Coulomb blockade in coupled quantum dot systems

F. J. Kaiser, S. Kohler, P. Hänggi, M. Malecha, J. Ebbecke, A. Wixforth, H. W. Schumacher, B. Kästner, D. Reuter, A. D. Wieck

Published 2008-02-20Version 1

Two strongly coupled quantum dots are theoretically and experimentally investigated. In the conductance measurements of a GaAs based low-dimensional system additional features to the Coulomb blockade have been detected at low temperatures. These regions of finite conductivity are compared with theoretical investigations of a strongly coupled quantum dot system and good agreement of the theoretical and the experimental results has been found.