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Isotope scattering of dispersive phonons in Ge
| Title: | Isotope scattering of dispersive phonons in Ge |
| Authors: | Tamura, Shin-ichiro1 Browse this author →KAKEN DB |
| Authors(alt): | 田村, 信一朗1 |
| Issue Date: | 15-Jan-1983 |
| Publisher: | American Physical Society |
| Journal Title: | Physical Review B |
| Volume: | 27 |
| Issue: | 2 |
| Start Page: | 858 |
| End Page: | 866 |
| Publisher DOI: | 10.1103/PhysRevB.27.858 |
| Abstract: | With the use of a lattice-dynamical model which reproduces observed phonon dispersion curves very accurately, the isotope scattering of near-zone-boundary acoustic phonons in Ge is investigated theoretically. We show that the lattice dispersion which becomes appreciable in the THz-frequency region leads to the phonon relaxation time that decreases more rapidly than ω(-4). This deviation from the ω(-4) dependence (the ω(-4) behavior is predicted by the continuum elasticity theory) amounts to about 20% at 1 THz and is enhanced heavily at the zone boundaries. Calculations are based on the lowest-order perturbation theory. Higherorder corrections are estimated as well and shown to be negligibly small. |
| Rights: | Copyright © 1983 American Physical Society |
| Relation: | http://www.aps.org/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/5956 |
| 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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