2002/12/31 by T. A. Costi
Physics and Astronomy · #cond-mat.str-el #cond-mat.mes-hall
published as Concepts in Electron Correlations, p.247, Kluwer,Dordrecht,2003 (Ed. A.C.Hewson and V.Zlatic) · 9 pages, 8 eps figures, proceedings paper for 2nd Hvar workshop on Concepts in Correlated Electrons
arxiv created 2002/12/31 · arxiv updated 2009/11/30
We study electronic transport through a strongly interacting quantum dot by using the finite temperature extension of Wilson's numerical renormalization group (NRG) method. This allows the linear conductance to be calculated at all temperatures and in particular at very low temperature where quantum fluctuations and the Kondo effect strongly modify the transport. The quantum dot investigated has one active level for transport and is modeled by an Anderson impurity model attached to left and right electron reservoirs. The predictions for the linear conductance are compared to available experimental data for quantum dots in heterostructures. The spin-resolved conductance is calculated as a function of gate voltage, temperature and magnetic field strength and the spin-filtering properties of quantum dots in a magnetic field are described.