NONLINEAR CONDUCTANCE FOR THE 2 CHANNEL ANDERSON MODEL

Using the integral equations of the noncrossing approximation, the dif ferential conductance is computed as a function of voltage for scatter ing from a two channel Kondo impurity in a point contact. The results compare well to experimental data on Cu point contacts by Ralph and Bu hrman. They support a recently proposed scaling hypothesis, and also s how finite temperature corrections to scaling in agreement with experi ment.