Infrared Studies of Cuprates, Superconductors, and Correlated Metals

w：\awards\awards96\num.doc 9705108坦纳 该实验研究项目利用远红外到紫外波长范围内的光学研究来阐明高温超导体和相关新型金属的正常和超导状态的特性。重点是利用谱研究掺杂诱导的谱权和超流谱权以及它们与 转变温度。 其他议题包括 非Drude中红外吸收、载流子散射、超导能隙和强外磁场的影响。 %这个实验研究项目利用光的吸收来研究氧化铜超导体和相关材料。 实际上，这些测量计算了每个铜中的移动的电子的数量，并确定了在超导转变温度以下有多少电子凝结成超流体。这提供 重要 直接 信息 关于 超导性。 重新进行测量 一 宽的波长和温度范围，并且包括在样品受到强磁场时的测量。 本研究的结果可能包括不寻常的新效果或可能在技术中找到新应用的材料。本研究项目是跨学科性质的，涉及研究生，他们将接受良好的培训，进入工业，政府或教育的职位。 ***

w:\awards\awards96\num.doc 9705108 Tanner This experimental research project utilizes optical studies in the far-infrared through the ultraviolet wavelength range to clarify properties of normal and superconducting states of high temperature superconductors and related novel metals. An emphasis is on use of the spectra to study the doping-induced and superfluid spectral weights and their relationship to the transition temperature. Other issues include the non-Drude midinfrared absorption, the scattering of charge carriers, the superconducting energy gap and the effects of strong external magnetic fields. %%% This experimental research project uses the absorption of light to study the copper-oxide superconductors and related materials. The measurements, in effect, count the number of mobile electrons per copper and determine how many of these condense into the superfluid below the superconducting transition temperature. This provides important direct information about the superconductivity. The measurements are done over a wide wavelength and temperature range, and include measurements while the sample is subjected to a strong magnetic field. Results from this research may include unusual new effects or materials which may find new application in technology. This research project is interdisciplinary in nature and involves graduate students who will be excellently trained to enter positions in industry, government or education. ***