| Popis: |
The Kapitza resistance of tin and indium, in both the superconducting and normal states, and sapphire have been mesaured in the temperatare range of 1.3 to 2 deg K. The results are compared with those reported for superconducting and normal lead as well as with the predicted values from current theory. Although quaiitative agreement with the theory is obtained, large discrepancies in the absolute value of the Kapitza registance as well as its temperature dependence for metals in their superconducting state are observed, suggesting the existence of other, as yet undiscovered, parallel mechanisms. The effect of electric field on the Kapitza resistance between platinum and liquid helium was investtgated with the hope of determining the influence of the coupling between the phonons of the liquid and the part of the electronic wave functions of the metal which decay into the liquid on the Kapitza resistance. Under our experimental conditions, no effect is observed. (auth) |
