Thermoelectric power anomalies and electron-phonon interaction in nonequilibrium solid solutionsAl1−xSix

We report unusual behavior of the low-temperature thermopower of nonequilibrium ${\mathrm{Al}}_{1-x}{\mathrm{Si}}_x$ substitutional solid solutions. The thermopower and resistivity results suggest that the low-temperature anomalies of these parameters are likely due to electron-phonon interaction enhancement in the vicinity of the fcc lattice instability in these superconductors.