Superconductivity of BaPb1−xBixO3 in the coexisting state of itinerant large polarons and localized small bipolarons
作者： S. Sugai
DOI: 10.1016/0038-1098(89)90792-8
关键词: Polaron 、 Metal–insulator transition 、 Condensed matter physics 、 Wave function 、 Electron localization function 、 Raman scattering 、 Superconductivity 、 Electron 、 Bipolaron 、 Chemistry
摘要: Abstract The systematic analysis of strongly x-dependent continuum peaks in the Raman spectra BaPb1−xBixO3 manifested that is formed five sets peaks. These are assigned to breathing mode coupled with itinerant electrons and localized electrons. transition from electronic state shows softening toward opening point insulating pseudo-gap at x=0.15. has a finite extent wave function metal-insulator x=0.35 caused by disappearance percolation conductance. self-trapped bipolaronic state. strong interaction between bipolarons possible origin this superconductivity.
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