THEORY FOR NORMAL-STATE CRITICAL KAPITZA RESISTANCE OF HE-4

We study a steady state, bearing a heat current, Q(0). In the normal s tate of liquid He-4 with constraining geometry, near the lambda point, at temperatures T greater than the lambda temperature, T-lambda. Crit ical order parameter fluctuations near the boundary are incorporated i n the expression for the non-local thermal resistivity. The Kapitza re sistance is manifested by the additional temperature rise at the bound ary, as compared with the bulk-extrapolated value. Sensitivity of the calculations to the application of the Dirichlet boundary condition is discussed. (C) 1998 American Institute of Physics.