Effect of Interactions on the Admittance of Ballistic Wires

Details Effect of Interactions on the Admittance of Ballistic Wires Effect of Interactions on the Admittance of Ballistic Wires

1997-06-07

arxiv.org/abs/cond-mat/9706070v2

Europhys. Lett. 42, 535 (1998)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Presentation considerably modified; the results are unchanged. 4 pages, 2 figures .eps-format included

Scientific paper

10.1209/epl/i1998-00284-x

A self-consistent theory of the admittance of a perfect ballistic, locally charge neutral wire is proposed. Compared to a non-interacting theory, screening effects drastically change the frequency behavior of the conductance. In the single-channel case the frequency dependence of the admittance is monotonic, while for two or more channels collective interchannel excitations lead to resonant structures in the admittance. The imaginary part of the admittance is typically positive, but can become negative near resonances.

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