Coulomb drag in mesoscopic rings

Details Coulomb drag in mesoscopic rings Coulomb drag in mesoscopic rings

1996-09-23

arxiv.org/abs/cond-mat/9609224v2

Phys. Rev. B 55, 13702 (1997)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Latex 10 pages + 2 Figures

Scientific paper

10.1103/PhysRevB.55.13702

We develop a Luttinger liquid theory of the Coulomb drag of persistent currents flowing in concentric mesoscopic rings, by incorporating non-linear corrections to the electron dispersion relation. We demonstrate that at low temperatures, interactions between electrons in different rings generate an additional phase and thus alter the period of Aharonov-Bohm oscillations. The resulting nondissipative drag depends strongly on the relative parity of the electron numbers. We also show that interactions set a new temperature scale below which the linear response theory does not apply at certain values of external flux.

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