Ultrasonic Absorption by Superconducting Nb-Zr Alloys

Autor:	Lewis T. Claiborne, Norman G. Einspruch
Rok vydání:	1963
Předmět:	Superconductivity Physics Condensed matter physics Band gap Phonon Scattering Phenomenological model Quasiparticle General Physics and Astronomy Atomic physics Absorption (electromagnetic radiation) Fermi gas
Zdroj:	Physical Review. 132:621-629
ISSN:	0031-899X
DOI:	10.1103/physrev.132.621
Popis:	Ultrasonic attenuation studies in dilute superconducting Nb-Zr alloys revealed strongly temperature-dependent absorption peaks that cannot be explained in terms of single electron-phonon scattering processes. The set of temperatures at which these peaks occur is dependent on the frequency of the sound wave and the strain content of the sample. A phenomenological model is proposed that interprets the absorption peaks as being due to an exchange of energy that occurs when the sound frequency is equal to one of a set of collective excitation modes of the electron gas. The assumptions on which the model is based are the same as those that yield collective excitations within the energy gap in more fundamental descriptions of the superconducting please delete the above abstract no. 39767---
Databáze:	OpenAIRE
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