Kapitza resistance between liquid and solid helium

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1982

OSTI ID:7025515

Huber, T E

The results of a study of the Kapitza resistance (R/sub K/ between liquid and solid helium-4 are presented. In the first chapter the recent proposal by Andreev and Parshin that, because of quantum delocalization of surface defects, the boundary between liquid and solid helium-4 would be in a special state is discussed. This state may be regarded as a quantum analog of an atomically rough interface. This particular interface is able to impede the passage of phonons because it can melt or freeze without dissipation as a response to an external non-equilibrium situation, i.e., pressure waves (phonons). In the second chapter two calculations of R/sub K/ are presented. One of them, the Acoustic-Mismatch calculation, is based on a model of the interface where no melting or freezing can occur. In this model the interface behaves as classical (non-rough). The usual T/sup -3/ temperature dependence is obtained. The other calculation is based on the model of the rough interface of Andreev and Parshin. R/sub K/ has a T/sup -5/ temperature dependence at low temperatures. At high temperatures (T > 0.5K) the two theories give approximately the same result for R/sub K/. In the third and fourth chapter experimental results for the phonon transmission coefficient across the interface are presented. These measurements are consistent with the rough interface theory of the Kapitza resistance.

• Research Organization: Brown Univ., Providence, RI (USA)
• OSTI ID: 7025515
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
BOUNDARY LAYERS
DATA
EVEN-EVEN NUCLEI
FLUIDS
HELIUM 4
HELIUM ISOTOPES
INFORMATION
ISOTOPES
KAPITZA RESISTANCE
LAYERS
LIGHT NUCLEI
LIQUIDS
NUCLEI
NUMERICAL DATA
PHONONS
QUASI PARTICLES
ROUGHNESS
SOLIDS
STABLE ISOTOPES
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
THEORETICAL DATA
THERMAL BOUNDARY RESISTANCE