Persistent current in metals with a large dephasing rate
Institut für Physik, Universität Augsburg,
86135 Augsburg, Germany
Published online: 15 November 2000
In a weakly disordered metal electron interactions are responsible for both decoherence of the quasi-particles as well as for quantum corrections to thermodynamic properties. We consider electrons which are interacting with two-level-systems. We show that the two-level-systems enhance the average equilibrium ("persistent") current in an ensemble of mesoscopic rings. The result supports the recent suggestion that two puzzles in mesoscopic physics may be related: The low temperature saturation of the dephasing time and the high persistent current in rings.
PACS: 05.30.Fk – Fermion systems and electron gas / 73.23.Ra – Persistent currents
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000