Superconductivity of polar many-valley semiconductors and semimetals
A polar, degenerate semiconductor with two equivalent isotropic valleys, and a semimetal with equal effective masses for the holes and electrons were studied within the framework of a modified Gurevich-Larkin-Firsov model by taking into account the intervalley pairing. Concentration dependencies are found for the critical temperature which agree qualitatively with experimental data for SrTiO3 and BaPb(1-x)Bi(x)O3.
Gabovich, A. M.↗