Tunneling states in a single-grain Al-Cu-Fe quasicrystal
| العنوان: | Tunneling states in a single-grain Al-Cu-Fe quasicrystal |
|---|---|
| المؤلفون: | Yvonne Calvayrac, G. Bellessa, Fabrice Bert, A. Quivy |
| المصدر: | Physical Review B. 61:32-35 |
| بيانات النشر: | American Physical Society (APS), 2000. |
| سنة النشر: | 2000 |
| مصطلحات موضوعية: | Physics, Amorphous metal, Condensed matter physics, Coupling parameter, Attenuation, Density of states, Quasicrystal, Plateau (mathematics), Coupling (probability), Quantum tunnelling |
| الوصف: | Velocity and attenuation of acoustic waves (190 Mhz) have been measured in a phason-free single grain of i-AlCuFe between 40 mK and 30 K. The results reveal the existence of tunneling states (TS's). The coupling parameter $P{\ensuremath{\gamma}}^{2}$ (where P is the TS density of states and $\ensuremath{\gamma}$ is the phonon-TS coupling) is close to the one in metallic glasses. The crossover temperature from the ${T}^{3}$ law to the plateau regime in the attenuation is well defined. Hence, within the TS model, both P and $\ensuremath{\gamma}$ can be calculated. The TS's seem to be intrinsic to the quasicrystal structure. |
| تدمد: | 1095-3795 0163-1829 |
| DOI: | 10.1103/physrevb.61.32 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::cfc15437116322f849b9b341c6366e65 https://doi.org/10.1103/physrevb.61.32 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi...........cfc15437116322f849b9b341c6366e65 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10953795 01631829 |
|---|---|
| DOI: | 10.1103/physrevb.61.32 |