SEMINARIUM

Centrum Doskonałości MagMol
"Magnetyczne i Molekularne Materiały dla Nanoelektroniki"
w Instytucie Fizyki Molekularnej PAN w Poznaniu

Dnia: 14.11.2007 roku (środa)
o godzinie 13:00 w Auli Instytutu

referat pt.:

Sensitivity of the effective transmission of an interacting nanosystem upon external scatterers

wygłosi

Prof. Jean-Louis Prichard

Service de Physique de l’Etat Condensé, CEA-Saclay, 91191 Gif sur Yvette, France

Abstract
We discuss the extension of the Landauer formulation of quantum transport to nanosystems inside which electron-electron interactions cannot be neglected. We show that a many-body scatterer can be mapped onto an effective one body scatterer at very low temperatures. But, in contrast to the non interacting limit, this effective scatterer depends on external scatterers which can be present in the attached leads. Using the Hartree-Fock approximation and simple models, we study this non local effect upon quantum transport. We discuss how to detect it using two dimensional electron gases coupled via a quantum point contact. Eventually, we show how a Kondo effect can occur in a spinless model because of inversion.