|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >
Spontaneous decay rates of LA phonons in quasi-isotropic solids
| Title: | Spontaneous decay rates of LA phonons in quasi-isotropic solids |
| Authors: | Tamura, Shin-ichiro1 Browse this author →KAKEN DB |
| Authors(alt): | 田村, 信一朗1 |
| Issue Date: | 15-Feb-1985 |
| Publisher: | American Physical Society |
| Journal Title: | Physical Review B |
| Volume: | 31 |
| Issue: | 4 |
| Start Page: | 2574 |
| End Page: | 2577 |
| Publisher DOI: | 10.1103/PhysRevB.31.2574 |
| Abstract: | The spontaneous decay rates of LA phonons are calculated in terms of the second- and third-order elastic constants in the isotropic model. It is shown that the dominant decay channel is LA→TA+TA but not LA→LA+TA and total decay rates at 1-THz frequency range from 10(5) to 10(6) sec(-1) for Si, Ge, GaAs, LiF, NaF, and fused silica. These results indicate that the rates of frequency down conversion of the LA phonons assumed currently in the study of the transport properties of high-frequency phonons are incorrect in both their magnitudes and branching ratios. |
| Rights: | Copyright © 1985 American Physical Society |
| Relation: | http://www.aps.org/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/5968 |
| 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
|
