PHONON--QUASIPARTICLE INTERACTIONS IN DILUTE SOLUTIONS OF $sup 3$He IN SUPERFLUID $sup 4$He. I. PHONON THERMAL CONDUCTIVITY AND ULTRASONIC ATTENUATION.
PHONON--QUASIPARTICLE INTERACTIONS IN DILUTE SOLUTIONS OF $sup 3$He IN SUPERFLUID $sup 4$He. I. PHONON THERMAL CONDUCTIVITY AND ULTRASONIC ATTENUATION.
复制标题
声子——超流体 $sup 4$He 中 $sup 3$He 稀溶液中的准粒子相互作用。
DOI：
10.1103/physrev.164.235
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发表时间：
1967
期刊：
影响因子：
--
通讯作者：
C. Ebner
中科院分区：
文献类型：
--
作者：
G. Baym;C. Ebner
Expressing the interaction between long-wavelength phonons and He 3 quasiparticles in dilute solutions of He 3 in He 4 entirely in terms of macroscopic observables, we calculate the attenuation of first sound due to the He 3 viscosity, and the rate of scattering of phonons from the He 3. The results for the attenuation are in excellent agreement with recent experiments. In addition, we calculate the thermal conduction due to phonons for T≲ 0.6 K; the conductivity is limited at very low temperatures by ultrasonic attenuation, while at higher temperatures it is predominantly limited by elastic phonon-quasiparticle scattering.
