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Shot noise in tunneling transport through molecules and coupled quantum dots

Aghassi, J.; Thielmann, A.; Hettler, M.; Schön, G.

Abstract (englisch):
We consider charge transport through a nanoscopic object such as single molecules or coupled quantum dots, that is weakly coupled to metallic electrodes. We explicitly account for the electronic interactions and the resulting many-body states of the molecule/quantum dots, and allow for relaxation of the excited states. The current-voltage characteristics as well as the current noise are calculated within first-order perturbation expansion in the coupling strengths. For the case of a semi-quantitative model of benzene we predict negative-differential-conductance accompanied with super-poissonian noise. For a series coupled quantum dots, we analyze the shot noise in the various regimes of transport depending on the inter-dot coupling and participating many-body states.

Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Institut für Theoretische Festkörperphysik (TFP)
Publikationstyp Vortrag
Jahr 2005
Sprache Englisch
Identifikator KITopen ID: 230060710
HGF-Programm 42.01.01; LK 01
Erschienen in Physik seit Albert Einstein : 69. Jahrestagung der DPG, Berlin, 4. - 9. März 2005
URLs Abstract (PDF)
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