Raman and Other Optical Properties of Superconductors

超导体的拉曼和其他光学特性

• 批准号: 8715103
• 负责人: Miles Klein
• 金额: $ 20.21万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-11-15 至 1991-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8715103&HistoricalAwards=false
• 关键词: Raman; Other; Optical; Properties; Superconductors

Highly-correlated f-electron metals, especially those that show heavy Fermion behavior, will form the main thrust of this project. Emphasis will be on how the coupling of the f-electron atom to its environment affects optical properties and light scattering. When Raman-active modes are found whose intensity, as with URu2Si2, increases upon the gradual onset of the heavy- Fermion state, a magnetic field will be used to suppress the onset and the effect in the spectra will be observed. Waves in magnetically-ordered states and magnetic excitations will be studied. The strong electronic Gruneisen effect will be exploited by measuring Raman spectra under pressure. The Raman results will be correlated with known elastic constant results and new ones to be obtained using Brillouin scattering. Raman and optical-property measurements will be made on the new high Tc superconductors. Emphasis will be placed on the effects of surface treatment, especially control of oxygen content on the spectra. The role of structural distortions will be elucidated by Raman Brillouin scattering measurements. Correlations will be made with superconducting and structural measurements made by collaborators.

高度相关的f电子金属，尤其是那些 重费米子行为，将形成这一主要推力 项目 重点是f电子的耦合 原子与其环境的相互作用会影响光学性质和光 散射 当发现拉曼激活模式的强度， 2012年，随着经济的快速发展， 费米子状态下，磁场将被用来抑制 将观察光谱中的起始和效果。 波 磁有序状态和磁激发将是 研究了 强烈的电子Gruneisen效应将是 通过在压力下测量拉曼光谱来开发。 该拉曼 结果将与已知的弹性常数结果相关联 以及使用布里渊散射获得的新的。 拉曼 并将对新的高温超导体进行光学性质的测量 超导体 重点将放在以下方面的影响： 表面处理，特别是控制表面上的氧含量， 谱 结构扭曲的作用将得到阐明 通过拉曼布里渊散射测量。 相关性将是 超导和结构测量的结果 合作者