Correlated disorder in a p-wave superfluid

The role of aerogel as a means of introducing correlated disorder into supe rfluid He-3 is examined in this paper. The aerogel structure is described b y a diffusion-limited cluster aggregation model and compared to the results of small-angle x-ray scattering obtained from samples that were used to st udy the suppression of T-c as well as the development of the superfluid fra ction. These results highlight special characteristics of aerogels that mak e this medium appropriate as a means of introducing disorder into 3He. We d iscuss the inapplicability of the Abrikosov-Gorkov model of an impure super conductor to the He-3-aerogel system, and then detail the behavior of T-c a nd the superfluid fraction of He-3 contained in three different samples of aerogel.