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High-frequency acoustics of 3He in aerogel
- Source :
-
Physical review letters [Phys Rev Lett] 2000 Nov 13; Vol. 85 (20), pp. 4325-8. - Publication Year :
- 2000
-
Abstract
- High-frequency ( approximately 15 MHz) acoustics were performed on 3He in 98% porous silica aerogel using an acoustic cavity technique. Measurements of the sound attenuation in the normal Fermi liquid and superfluid display behavior quite different from the bulk owing to strong elastic scattering of quasiparticles. The transition from first-to-zero sound is completely obscured with a quasiparticle mean-free path estimated to be in the range of 200-300 nm. No collective mode attenuation peak was observed at or below the superfluid transition.
Details
- Language :
- English
- ISSN :
- 1079-7114
- Volume :
- 85
- Issue :
- 20
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 11060629
- Full Text :
- https://doi.org/10.1103/PhysRevLett.85.4325