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Photogenerated Polarons in High-Tc Superconducting Oxides: Infrared Excitation Spectroscopy and Transient Photoinduced Conductivity in Semiconducting Yttrium-Barium-Copper-Oxides

Photogenerated Polarons in High-Tc Superconducting Oxides: Infrared Excitation Spectroscopy and Transient Photoinduced Conductivity in Semiconducting Yttrium-Barium-Copper-Oxides
高温超导氧化物中的光生极化子：半导体钇钡铜氧化物中的红外激发光谱和瞬态光致电导率
批准号：
9102634
负责人：
Alan Heeger
金额：
$0.0万
依托单位：
University of California-Santa Barbara
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1991
资助国家：
美国
项目状态：
已结题
起止时间：
1991-02-15 至 1992-01-31
来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9102634&HistoricalAwards=false
关键词：
PhotogeneratedPolaronsTcSuperconductingOxides

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英文摘要
Funds are requested for a Small Grants for Exploratory Research award to study the fast transient photoinduced conductivity and photoinduced absorption of materials from the family of high temperature superconducting oxides. Photoinduced absorption studies in this researcher's laboratory have already demonstrated carriers on the copper oxide planes are polarons and large transient decreases in the resistivity of single crystals of yttrium-barium cuprate have been observed. The proposed research will search for experimental evidence of the relevence of the polarons to the mechanism of superconductivity. The level of excitation will be sufficiently high to approach a photoinduced metallic state and photoinduced superconductivity.
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