Correlation of anomalous scattering and superconductivity in Pb${}_{.99}$Tl${}_{.01}$Te doped with additional indium donors

A. S. Erickson, N. P. Breznay, E. A. Nowadnick +2

Recent evidence for a charge-Kondo effect in superconducting samples of Pb${}_{1-x}$Tl${}_x$Te [1] has brought renewed attention to the possibility of negative U superconductivity in t…