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Conductance through a One-Dimensional Correlated System: Relation to Persistent Currents and Role of the Contacts

By Rafael A. Molina, Dietmar Weinmann, Rodolfo A. Jalabert, Gert-Ludwig Ingold and Jean-Louis Pichard

Abstract

Based on a recent proposal [O.P. Sushkov, Phys. Rev. B 64, 155319 (2001)], we relate the quantum conductance through a sample in which electrons are strongly correlated to the persistent current of a large ring, composed of the sample and a non-interacting lead. A scaling law in the lead length allows to extrapolate to a well-defined value of the conductance, depending only on intrinsic properties of the sample and the nature of the contacts between the sample and the lead. For strongly disordered samples, the conductance is found to be enhanced by the interaction.Comment: 4 pages, 4 figures, RevTeX

Topics: Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Disordered Systems and Neural Networks, Condensed Matter - Mesoscale and Nanoscale Physics
Publisher: 'American Physical Society (APS)'
Year: 2002
DOI identifier: 10.1103/PhysRevB.67.235306
OAI identifier: oai:arXiv.org:cond-mat/0209552

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