Magnetism in Light of High Temperature Superconductivity, Granular Superconductors, and Mott Insulators

从高温超导性、粒状超导体和莫特绝缘体角度看磁性

• 批准号: 8907664
• 负责人: Sudip Chakravarty
• 金额: $ 16.6万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-11-15 至 1992-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8907664&HistoricalAwards=false
• 关键词: Magnetism; Light; Temperature; Superconductivity; Granular

The recently discovered high temperature superconductors exhibit many novel magnetic effects. This has caused physicists to revisit the intimate connections between magnetism and superconductivity. The proposed research will look at the static and dynamic properties of quantum antiferromagnets which characterize LaCuO. Also, theoretical studies of thin film granular superconductors are characterized by two energy scales: a scale at which the amplitude of the order parameter developes and a second scale at which phase coherence develops across the entire sample. Research on these systems requires novel ideas concerning quantum fluctuations of the phase order parameter. The final reserach thrust will look at Mott insulators using a principle of local gauge invariance to understand transitions from the insulating state to a metallic or superconducting one.

最近发现的高温超导体展示了 许多新的磁效应。 这使得物理学家们 重新审视磁性和 超导性 拟议的研究将着眼于静态 量子反铁磁体的动力学性质， 表征LaCuO。 此外，薄膜的理论研究 粒状超导体的特征在于两个能量尺度： 序参量振幅发展的尺度 和第二尺度，在该尺度下，相位相干性在整个 整个样品。 对这些系统的研究需要新颖的想法 关于相序参数的量子涨落。 最后的研究推力将着眼于莫特绝缘体使用 理解跃迁的局部规范不变性原理 从绝缘状态到金属或超导状态。