Femtosecond thermomodulation study of high-Tc superconductors
作者： S.D. Brorson , A. Kazeroonian , D.W. Face , T.K. Cheng , G.L. Doll
DOI: 10.1016/0038-1098(90)90997-P
关键词: Superconductivity 、 Inorganic compound 、 Transition temperature 、 Femtosecond 、 Excitation 、 Materials science 、 Condensed matter physics 、 Thin film 、 High-temperature superconductivity 、 Inorganic chemistry 、 Fermi level
摘要: Abstract We present the first femtosecond pump-prove measurements of room temperature optical properties high-Tc superconductors. Three oriented superconducting thin-films were studied: YBa2Cu3O7−δ, Bi2Sr2CaCu2O8+z, and Bi2Sr2Ca2Cu3O10+y. The observed changes in e2 can be related to dynamics Cu d O p band charge transfer excitation occurring planes. By depleting YBa2Cu3O7−δ sample oxygen, we simultaneously vary Fermi level Tc. sign Δe2 is found depend on position, while recovery time increase markedly with decreasing
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