INFLUENCE OF DISLOCATIONS ON THE KAPITZA CONDUCTANCE OF COPPER AT TEMPERATURES BETWEEN 1-K AND 2-K

An experiment is described in which the dependence of the Kapitza conductance of copper to He II on the dislocation density near the interface is investigated in the temperature range of 1-2 K. A dependence is found, which has not been reported before, giving support to the dislocation -based theoretical models. The Kapitza conductance for a low-dislocation-density sample is shown to be an order of magnitude below the usual values, and within the range of validity of these theories. © 1979 Plenum Publishing Corporation.