Coulomb effects on the transmittance of open quantum dots in a tight-binding model

Aldea, A.; Manolescu, A.; Moldoveanu, V.

Coulomb effects on the transmittance of open quantum dots in a tight-binding model

Authors

Aldea, A.

Manolescu, A.

Moldoveanu, V.

Description

A quantum-mechanical calculation of conductance in an open quantum dot is performed in the Landauer-Büttiker formalism using a tight binding Hamiltonian with direct Coulomb interaction. The charge distribution in the dot is calculated self-consistently as function of a gate potential, for various dot-leads couplings. The interaction is active only inside the dot, but not in the leads, its strength being an input parameter. Our calculations are complementary to the master-equation approach, go beyond the "orthodox theory", and account for the size, tunneling, and interaction effects in quantum dots.
5 pages, 2 figures, to appear in Annalen der Physik (Leipzig)