Correlated few-particle states in artificial bipolar molecule

Abstract

We investigate the ground and excited states of a bipolar artificial molecule composed of two vertically coupled quantum dots containing different type of carriers -- electrons and holes -- in equilibrium. The approach based on exact diagonalization is used and reveals an intricate pattern of ground-state angular momentum switching and a rearrangement of approximate single-particle levels as a function of the inter-dot coupling strength.

4 Physical Review style pages, 4 eps figures embedded, uses REVTeX 4 and graphicx package

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