Few-particle states in coupled electron-hole quantum dotsFew-particle states in coupled electron-hole quantum dots
Faculty of Sciences. Physics
Condensed Matter Theory
Proceedings of the Conference Progress in Nonequilibrium Green's
Conference on Progress in Nonequilibrium Greens Functions, AUG 19-23, 2002, Dresden, GERMANY
(2003), p. 330-337
University of Antwerp
We apply the exact diagonalization technique to calculate the ground and excited states of a bipolar artificial molecule composed of two vertically coupled quantum dots containing different types of carriers electrons and holes in equilibrium. In this system, the magnetic field tunes the relative role of intra-dot Coulomb interaction while the inter-dot separation sets the strength of inter-dot correlations. We find an intricate pattern of the switching of the ground-state angular momentum with increasing magnetic field and a rearrangement of approximate single-particle levels as a function of the inter-dot coupling strength.