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

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

1999-08-27

arxiv.org/abs/cond-mat/9908399v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 2 figures, to appear in Annalen der Physik (Leipzig)

Scientific paper

A quantum-mechanical calculation of conductance in an open quantum dot is performed in the Landauer-B\"{u}ttiker 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.

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