Acoustics of a Dirty Fermi liquid : 3He in aerogel
作者： G. Gervais , R. Nomura , T. M. Haard , Y. Lee , N. Mulders
关键词: Attenuation 、 Fermi liquid theory 、 Materials science 、 Condensed matter physics 、 Mean free path 、 Elastic scattering 、 Aerogel 、 Biot number 、 Scattering 、 Acoustic attenuation
摘要: An acoustic cavity containing 3He in 98% porous silica aerogel was used to investigate the effects of impurity scattering a Fermi liquid. The pressure and temperature dependence sound attenuation normal liquid extracted from response. displays behavior very different bulk owing strong elastic quasi-particles by strands. Using visco-elastic model liquid, we find mean free path restricted ∼340 nm. Information on velocity is inferred oscillation period data can be accounted for Biot aerogel.
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