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Numerical evidence for the bottleneck frequency of quasidiffusive acoustic phonons
| Title: | Numerical evidence for the bottleneck frequency of quasidiffusive acoustic phonons |
| Authors: | Tamura, Shin-ichiro1 Browse this author →KAKEN DB |
| Authors(alt): | 田村, 信一朗1 |
| Issue Date: | 1997 |
| Publisher: | American Physical Society |
| Journal Title: | PHYSICAL REVIEW B |
| Volume: | 56 |
| Issue: | 21 |
| Start Page: | 13630 |
| End Page: | 13633 |
| Publisher DOI: | 10.1103/PhysRevB.56.13630 |
| Abstract: | A kinetic equation on quasidiffusion of phonons was recently analyzed by Esipov and he predicted the existence of a bottleneck frequency (νBN) which separates the phonons decaying from those diffusing to a detector. We have solved numerically the kinetic equation and obtained the temporal evolution of phonon concentration excited at the center of a spherical sample. We have also performed Monte Carlo simulations of phonon propagation in the same geometry. At a time much later than the ballistic arrival time of phonons, both sets of results exhibit a sharp peak in the phonon concentration around the predicted νBN. With Monte Carlo simulations we have also confirmed the same relaxation rate for the phonons of frequencies ν<νBN. |
| Rights: | Copyright © 1997 American Physical Society |
| Relation: | http://www.aps.org/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/5918 |
| 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)
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Submitter: 田村 信一朗
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