Effect of interactions on the admittance of ballistic wires
Département de Physique Théorique,
Université de Genève CH-1211, Genève 4, Switzerland
Accepted: 8 April 1998
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.
PACS: 73.23.Ad – Ballistic transport / 73.61.-r – Electrical properties of specific thin films and layer structures (multilayers, superlattices, quantum wells, wires, and dots)
© EDP Sciences, 1998