Interacting electrons in disordered potentials: Conductance versus persistent currents

Details Interacting electrons in disordered potentials: Conductance versus persistent currents Interacting electrons in disordered potentials: Conductance versus persistent currents

1995-11-15

arxiv.org/abs/cond-mat/9511077v1

Phys. Rev. Lett. 76, 291 (1996)

Physics

Condensed Matter

REVTeX, 4 pages, 3 figures, all uuencoded, accepted for publication in PRL

Scientific paper

10.1103/PhysRevLett.76.291

An expression for the conductance of interacting electrons in the diffusive regime as a function of the ensemble averaged persistent current and the compressibility of the system is presented. This expression involves only ground-state properties of the system. The different dependencies of the conductance and persistent current on the electron-electron interaction strength becomes apparent. The conductance and persistent current of a small system of interacting electrons are calculated numerically and their variation with the strength of the interaction is compared. It is found that while the persistent current is enhanced by interactions, the conductance is suppressed.

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