Infrared Studies of Cuprates, Superconductors, and Correlated Metals

这个实验研究项目利用远红外通过紫外线波长范围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态的性质。重点是利用光谱研究掺杂诱导光谱和超流体光谱重量及其与转变温度的关系。其他问题包括非德鲁德中红外吸收，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铜氧化物超导体及其相关材料。实际上，这些测量计算了每种铜的可移动电子的数量，并确定其中有多少在超导转变温度以下凝聚到超流中。这提供了有关超导电性的重要直接信息。这些测量是在很宽的波长和温度范围内进行的，包括在样品受到强磁场影响时进行的测量。这项研究的结果可能包括不同寻常的新效果或材料，可能会在技术上找到新的应用。这项研究项目本质上是跨学科的，涉及将接受良好培训以进入工业、政府或教育职位的研究生。***

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. ***