Volume 67, Number 1, July 2004
|Page(s)||96 - 102|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 June 2004|
Length-dependent oscillations of the conductance through atomic chains: The importance of electronic correlations
CEA/DSM, Service de Physique de l'Etat Condensé, Centre d'Etudes de Saclay 91191 Gif-sur-Yvette, France
2 Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 (CNRS-ULP) 23 rue du Loess, BP 43, 67034 Strasbourg Cedex 2, France
3 Laboratoire de Physique Théorique et Modélisation, Université de Cergy-Pontoise 95031 Cergy-Pontoise Cedex, France
Accepted: 30 April 2004
We calculate the conductance of atomic chains as a function of their length. Using the Density Matrix Renormalization Group algorithm for a many-body model which takes into account electron-electron interactions and the shape of the contacts between the chain and the leads, we show that length-dependent oscillations of the conductance whose period depends on the electron density in the chain can result from electron-electron scattering alone. The amplitude of these oscillations can increase with the length of the chain, in contrast to the result from approaches which neglect the interactions.
PACS: 73.23.-b – Electronic transport in mesoscopic systems / 05.60.Gg – Quantum transport / 73.63.Nm – Quantum wires
© EDP Sciences, 2004
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