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Focusing of large-wave-vector phonons in GaAs

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Title: Focusing of large-wave-vector phonons in GaAs
Authors: Tamura, Shin-ichiro1 Browse this author →KAKEN DB
Harada, Toshiharu Browse this author
Authors(alt): 田村, 信一朗1
Issue Date: 15-Oct-1985
Publisher: American Physical Society
Journal Title: Physical Review B
Volume: 32
Issue: 8
Start Page: 5245
End Page: 5250
Publisher DOI: 10.1103/PhysRevB.32.5245
Abstract: Focusing of 0- to 1.5-THz transverse-acoustic phonons in GaAs is studied on the basis of an extended rigid-ion model, which reproduces very accurately the observed dispersion curves of acoustic phonons. The shifts of phonon caustics due to lattice dispersion become conspicuous at frequencies above 1 THz. Calculated focusing patterns of ballistic phonons are found to be in good agreement with the characteristic features of phonon images obtained recently by Wolfe and Northrop. We also compare the dispersive shifts of caustics in GaAs with those in Ge and discuss its implication to the phonon-focusing experiments with large-wave-vector phonons.
Rights: Copyright © 1985 American Physical Society
Relation: http://www.aps.org/
Type: article
URI: http://hdl.handle.net/2115/5951
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 田村 信一朗

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