Superconductivity of tribolayers formed on germanium by friction between germanium and lead
Dukhovskoi A., Karapetyan S.S., Morozov Yu.G., Onishchenko A.S., Petinov V.I., Ponomarev A.N., Silin A.A., Stepanov B.M., Tal'roze V.L.
A superconducting state was observed for the first time in tribolayers of germanium produced by friction of germanium with lead at 42 K. The maximum value of Tc obtained in the experiment was 19 K, which is much higher than Tc of bulk lead itself or of lead films sputtered on germanium.