Interplay of chemical expansion, Yb valence, and low temperature thermoelectricity in the YbCu2Si2−xGex solid solution

YbCu2Si2 is a promising low temperature thermoelectric material because of the large broad peak in the Seebeck coefficient near 100 K combined with a low electrical resistivity. This behavior is thought to arise from fluctuating, or intermediate, valence effects due to partial occupation of Yb 4f en...

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