Electronic Structure and Polarizability
of Quantum Metallic Wires

A. N. Smogunov, L. I. Kurkina, and O. V. Farberovich

Voronezh State University, Universitetskaya pl. 1, Voronezh, 394893 Russia

e-mail: san@jok.vsu.ru

Received January 12, 2000

Abstract—The electronic structure and the linear response to an external electric field of simple metal wires
with a quantum-size cross-section have been studied within the density-functional theory and the “jellium”
model. It is found that an increase in the wire radius leads to a nonmonotonic change in the work function and
static polarizability of the wire. The photoabsorption spectra of Na wires with different cross-sections are
obtained. The effect of a dielectric environment on the properties of metallic wires is investigated. An increase
inthe permittivity of a medium brings about a decrease in the static polarizability of metallic wires. It is dem-
onstrated that the surface plasma resonance in the photoabsorption cross-section for Na wires placed in a dielec-
tric matrix is shifted from the continuous spectrum toward the range somewhat below the ionization threshold.
© 2000 MAIK “Nauka/Interperiodica”.

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