Electron-phonon SAW attenuation in aluminum for all ql

Author

Schneider, Susan C.

Author_Institution

Dept. of Electr. Comput. & Biomed. Eng., Marquette Univ., Milwaukee, WI, USA

Volume

36

Issue

1

fYear

1989

Firstpage

114

Lastpage

118

Abstract

Theoretical expressions for the electron-phonon contribution to the attenuation of surface acoustic waves (SAW) propagating on a semi-infinite block of material have been obtained for all ql, where q is the sound propagation vector and l is the electron mean-free path. The calculation of the attenuation due to electron-phonon interaction for ql<<1 is straightforward; however, extension of this calculation to all ql values requires knowledge of the ql dependence of the viscous damping coefficients, chi and eta . Approximations for chi and eta for all ql are obtained by analogy with attenuation expressions derived for longitudinal transverse bulk sound waves. Curves for chi , eta , and the electron-phonon contribution to the attenuation of SAW propagating on a semi-infinite block of aluminum are presented.<>

Keywords

acoustic wave propagation; aluminium; electron-phonon interactions; surface acoustic waves; Al; SAW attenuation; electron mean-free path; electron-phonon; longitudinal transverse bulk sound waves; sound propagation vector; surface acoustic waves; viscous damping; Acoustic materials; Acoustic propagation; Acoustic waves; Aluminum; Attenuation; Charge carrier processes; Damping; Electrons; Surface acoustic waves; Time of arrival estimation;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.16978

Filename

16978