Enhancement of persistent currents due to confinement in metallic samples

Details Enhancement of persistent currents due to confinement in metallic samples Enhancement of persistent currents due to confinement in metallic samples

2000-02-25

arxiv.org/abs/cond-mat/0002403v1

Phys.Rev.Lett. Vol.85, 4152 (2000).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 6 figures

Scientific paper

10.1103/PhysRevLett.85.4152

Confinement and surface roughness (SR) effects on the magnitude of the persistent current are analized for ballistic bidimensional metallic samples. Depending on the particular geometry, localized border states can show up at half filling. These border states contribute coherently to the persistent current and its magnitude is enhanced with respect to their value in the absent of confinement. A linear scaling of the typical current $I_{typ}$ with the number of conduction channels M is obtained. This result is robust with respect to changes in the relevant lengths of the samples and to the SR. Possible links of our results to experiments are also discussed.

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