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

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

2002-09-24

arxiv.org/abs/cond-mat/0209552v1

Phys. Rev. B 67, 235306 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures, RevTeX4

Scientific paper

10.1103/PhysRevB.67.235306

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.

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