Transport properties of the CexLa1-xCu2.05Si2 heavy-fermion alloy system -art. no. 195106

We report results of electrical resistivity and thermopower measurements on the CexLa1-xCu2.05Si2 alloy system from 2 to 300 K. It was shown that rega rdless of various concentration regimes the characteristic temperature beha ves in accordance with the Anderson impurity model. We have found evidence of the crystal electrical field contribution to the resistivity even for x <0.10. We conclude that the crystal field scheme does not change with conce ntration up to x = 1. The thermopower data support such a conclusion. In th e dilute region the disagreement from Fermi liquid behavior increases with increasing dilution. The position of this alloy system within Doniach's dia gram can give the explanation of this experimental fact. We also discuss th e origin of the negative low-temperature thermopower in the concentrated re gion.