Electron polaron effects in heavy-electron systems.
作者： S. H. Liu
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摘要: Heavy-electron materials exhibit Fermi-liquid behavior at low temperatures and single-site spin-fluctuation high temperatures. There is strong experimental evidence that the fermion excitations are itinerant f electrons. It shown in this paper Coulomb correlation between an hole conduction-band electrons causes to propagate like small polarons insulators semiconductors, accompanying screening cloud formed by broadband At elevated polaron increasingly attenuated it gradually becomes localized. This mechanism may explain many anomalous properties of heavy-electron up crossover temperature, suggesting could be driven effect.
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