|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >
Anharmonic scattering of longitudinal acoustic phonons : Herring processes in tetragonal TeO2 crystals
| Title: | Anharmonic scattering of longitudinal acoustic phonons : Herring processes in tetragonal TeO2 crystals |
| Authors: | Tamura, S.1 Browse this author →KAKEN DB | | Sangu, A. Browse this author | | Maris, H. J. Browse this author |
| Authors(alt): | 田村, 信一朗1 |
| Issue Date: | 2003 |
| Publisher: | American Physical Society |
| Journal Title: | PHYSICAL REVIEW B |
| Volume: | 68 |
| Start Page: | 014302 |
| Publisher DOI: | 10.1103/PhysRevB.68.014302 |
| Abstract: | We calculate the anharmonic scattering rates of low-frequency longitudinal (L) acoustic phonons with thermally excited phonons via the Herring process L + ST→FT (with ST and FT the slow-transverse and fast-transverse phonons, respectively) in a tetragonal TeO2 crystal. For temperatures well below the Debye temperature, we find a scattering rate = A2T3 as predicted by Herring. An analytical expression is derived for the variation of the coefficient with propagation direction. A typical value of A is of the order of 10–22 s K–3. For propagation along the fourfold axis, i.e., the [001] direction, however, A = 0, indicating that in this direction L phonons are stable against the Herring processes. This is in contradiction to the recent experimental result reported by Damen et al. [Phys. Rev. B 59, 349 (1999)]. We show that the vanishing of the scattering rate in the [001] direction can be understood in terms of the physics of the Herring process. |
| Rights: | Copyright © 2003 American Physical Society |
| Relation: | http://www.aps.org/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/5916 |
| 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
|
