The effects of nonmagnetic impurities on quasi-one-dimensional superconductors with anisotropic order parameters are studied in the framework of mean-field theory. We calculate the temperature dependence of the magnetic susceptibility and the specific heat and examine the low-temperature properties in terms of the density of states. The behavior of these thermodynamic quantities shows how the superconducting state is destroyed as the impurity concentration increases.

• Received 22 December 1988

DOI:https://doi.org/10.1103/PhysRevB.39.11398