Thermopower of the YbIn1-xAgxCu4 alloy system:: what does the thermopower minimum reflect in YbIn1-xAgxCu4?

We have found that the temperature of the thermopower minimum T-m, in the YbIn1-xAgxCu4 alloy system shows the same concentration dependence as the Kondo temperature extracted from susceptibility data, T-KS. However, the temperatures T-m are, on average, about four times smaller than these Kondo temperatures TKs. We discuss the origin of the thermopower minima and suggest possible interpretations of the extracted parameters T-m and T-KS from experimental data. (C) 2004 Elsevier B.V. All rights reserved.