Conductance of a double quantum dot with correlation-induced wave function renormalization

Details Conductance of a double quantum dot with correlation-induced wave function renormalization Conductance of a double quantum dot with correlation-induced wave function renormalization

2006-04-09

arxiv.org/abs/cond-mat/0604237v2

Physica B 378-380, 935 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

Presented on the The International Conference on Strongly Correlated Electron Systems SCES'05, July 26-30th 2005, Vienna, Aust

Scientific paper

10.1016/j.physb.2006.01.356

The zero-temperature conductance of diatomic molecule, modelled as a correlated double quantum dot attached to noninteracting leads is investigated. We utilize the Rejec-Ramsak formulas, relating the linear-response conductance to the ground-state energy dependence on magnetic flux within the framework of EDABI method, which combines exact diagonalization with ab initio calculations. The single-particle basis renormalization leads to a strong particle-hole asymmetry, of the conductance spectrum, absent in a standard parametrized model study. We also show, that the coupling to leads V=0.5t (t is the hopping integral) may provide the possibility for interatomic distance manipulation due to the molecule instability.

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