Acoustic waveguide modes observed in electrically heated metal wires

The steady-state resistance of small metal wires (Au sub 60 Pd sub 40 ) subject to an electric field is found to exhibit periodic resonances that scale with the width of the wire. The energies of the resonance have been determined using the low-temperature corrections to the resistance of the wires,...

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Bibliographic Details
Published in:Physical review letters 1992-08, Vol.69 (9), p.1427-1430
Main Authors: SEYLER, J, WYBOURNE, M. N. W
Format: Article
Language:English
Subjects:
Applied sciences
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Electronic transport phenomena in thin films and low-dimensional structures
Exact sciences and technology
Metals. Metallurgy
Physics
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Summary:The steady-state resistance of small metal wires (Au sub 60 Pd sub 40 ) subject to an electric field is found to exhibit periodic resonances that scale with the width of the wire. The energies of the resonance have been determined using the low-temperature corrections to the resistance of the wires, and are shown to correspond to acoustic modes of the wire. The resonances originate from increased energy relaxation that occurs when the electron system gains enough energy from the electric field to emit phonons in a higher acoustic subband of the wire.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.69.1427