Abstract
The results of optical studies of the nonmagnetic virtual-bound-state alloys CuNi, AuNi, AgPd, and AuPd are summarized. The importance of and phase shifts of the impurity potential is emphasized, and the results are reanalyzed in terms of an expression for the frequency-dependent relaxation time which includes , , and phase shifts and is consistent with the Friedel sum rule. CuNi appears anomalous. The various limitations of the theoretical expressions are discussed and it is suggested that CuNi may be understood if the effects of spin fluctuations are considered.
- Received 23 February 1976
DOI:https://doi.org/10.1103/PhysRevB.14.341
©1976 American Physical Society