Persistent currents in mesoscopic rings and boundary conformal field theory

Details Persistent currents in mesoscopic rings and boundary conformal field theory Persistent currents in mesoscopic rings and boundary conformal field theory

1998-12-22

arxiv.org/abs/cond-mat/9812351v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 4 enclosed postscript figures

Scientific paper

10.1142/S0217979299002939

A tight-binding model of electron dynamics in mesoscopic normal rings is studied using boundary conformal field theory. The partition function is calculated in the low energy limit and the persistent current generated as a function of an external magnetic flux threading the ring is found. We study the cases where there are defects and electron-electron interactions separately. The same temperature scaling for the persistent current is found in each case, and the functional form can be fitted, with a high degree of accuracy, to experimental data.

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