Photoexcited polarons in high-temperature superconducting oxides: Structural distortion and low-frequency polarizability. Technical report, 1990-1991

摘要: Photoinduced absorption measurements have been carried out in the infrared spectral range on a series of parent oxides high temperature superconductors. In all three materials, observation active vibrational (IRAV) modes and an associated electronic transition with common intensity dependence indicate formation self-localized polarons as photogenerated carriers. The photoinduced deep implies major shift oscillator strength leading to large local polarizability vicinity polaron.