Abstract
The nonlinear relation between current and voltage for a metallic point contact has recently been used for spectroscopic studies of the electron-phonon interaction in metals [1,2]. The conduction electrons accelerated over the contact by an applied voltage V spontaneously emit phonons up to frequencies eV/h. Here, we present a novel technique for injection of high-frequency phonons in insulating crystals using metallic point contacts. The contacts were made by pressing a Au whisker to a thin Au film (< 500 Å) evaporated on the surface of sapphire or ruby crystals. The phonons were detected with either a broadband bolometer or a frequency-selective optical detector.
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R.J.G. Goossens, J.I. Dijkhuis, H.W. de Wijn, to be published
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© 1984 Springer-Verlag Berlin Heidelberg
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Goossens, R.J.G., Dijkhuis, J.I., de Wijn, H.W., Jansen, A.G.M., Wyder, P. (1984). Generation of High-Frequency Phonons by Metallic Point Contacts. In: Eisenmenger, W., Laßmann, K., Döttinger, S. (eds) Phonon Scattering in Condensed Matter. Springer Series in Solid-State Sciences, vol 51. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-82163-9_9
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DOI: https://doi.org/10.1007/978-3-642-82163-9_9
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