| Numéro |
J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981
International Conference on Phonon Physics
|
|
|---|---|---|
| Page(s) | C6-890 - C6-892 | |
| DOI | https://doi.org/10.1051/jphyscol:19816264 | |
International Conference on Phonon Physics
J. Phys. Colloques 42 (1981) C6-890-C6-892
DOI: 10.1051/jphyscol:19816264
Laboratoire de Physique des Solides, Université de Paris-Sud, 91405 Orsay, France
J. Phys. Colloques 42 (1981) C6-890-C6-892
DOI: 10.1051/jphyscol:19816264
THE PHONON ANOMALY IN b.c.c. He4 : A PHONON SELF-TRAPPING ?
M. HéritierLaboratoire de Physique des Solides, Université de Paris-Sud, 91405 Orsay, France
Abstract
It is proposed that a longitudinal phonon in b.c.c. He4, at wavevector |[MATH]| ≈2.3 Å-1can be self-trapped in a liquid drop and form a roton-like excitation. This can account for anomalies observed in the phonon spectrum, in a sphere of momentum space.