This article reviews the experimental and theoretical investigations of the superconducting solid solutions BaPb$_{1-x}$Bi$_x$O$_3$ (BPB), which have critical temperatures $T_c\approx$ 13 K. The crystal structure, structural phase transitions, and the electrical and optical properties are examined in detail. Methods of preparing ceramic samples, as well as thin films and single crystals, are discussed briefly. Measurements of the electron specific heat and of the upper critical magnetic field are interpreted in terms of a theory of superconductors with partial dielectrization of the electron spectrum. Particular attention is paid to those properties of BPB which are a consequence of the granularity of the ceramic macrostructure and the existence of weak Josephson links between the granules. Correlations between the composition dependences of various normal and superconducting characteristics of BPB are elucidated, and the nature of the superconducting high Tc state with a small electron density of states ($N$(0) = 3$\cdot$10$^{21}$ eV$^{-1}$ cm$^{-3}$) at the Fermi surface is discussed.

RT Journal
T1 Metal oxide superconductor BaPb1–xBixO3: unusual properties and new applications
A1 Gabovich,A.M.
A1 Moiseev,D.P.
PB Physics-Uspekhi
PY 1986
FD 10 Dec, 1986
JF Physics-Uspekhi
JO Phys. Usp.
VO 29
IS 12
SP 1135-1150
DO 10.1070/PU1986v029n12ABEH003610
LK https://ufn.ru/en/articles/1986/12/e/