Low Energy Electrodynamics in Solids with Strong Electron Correlations

具有强电子相关性的固体中的低能电动力学

• 批准号: 1709161
• 负责人: Girsh Blumberg
• 金额: $ 70万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-08-01 至 2022-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1709161&HistoricalAwards=false
• 关键词: Low; Energy; Electrodynamics; Solids; Strong

Non-Technical Abstract:In many newly discovered materials, there is a particularly strong interaction between the electron charges or between the magnetic moments leading to new phenomena at relatively low temperatures. Examples include superconductivity - ability to conduct electricity without any loss - or other complex macroscopically ordered phases of charge and spin distributions. Understanding the unconventional properties of these materials presents a great intellectual challenge, and enhancement of transition temperatures of such macroscopically ordered states is critical to developing new technologies. This project investigates the basic mechanisms responsible for unconventional properties of strongly interacting materials by scattering light (i.e., "photons") from the materials while tuning the materials' properties through their novel phases. The goals of this project are to better understand the conditions responsible for the emerging properties, and to assist in development of novel materials with enhanced functionality. Technical Abstract:Interaction between electrons in "strongly correlated materials" is associated with many scientifically important and technologically useful phenomena, including superconductivity and exotically ordered charge and spin phases. This project applies the advances in low energy spectroscopy to characterize these extraordinary self-organized electronic phases, determine the condition under which they are formed, identify the underlying microscopic mechanisms, and test the relevant theories. This project also provides broad training to postdoc and undergraduate students in low-temperature high resolution magneto-optical spectroscopy.

非技术摘要：在许多新发现的材料中，电子之间或磁矩之间存在特别强的相互作用，导致在相对较低的温度下出现新的现象。例子包括超导性--无损耗导电的能力--或其他复杂的宏观有序电荷和自旋分布相。理解这些材料的非常规性质是一个巨大的智力挑战，而提高这种宏观有序状态的转变温度对于开发新技术至关重要。这个项目研究了强相互作用材料的非传统性质的基本机制，通过散射来自材料的光(即“光子”)，同时通过其新的相来调节材料的性质。该项目的目标是更好地了解产生新特性的条件，并帮助开发具有增强功能的新型材料。技术摘要：“强关联材料”中电子之间的相互作用与许多重要的科学和技术上有用的现象有关，包括超导电性和奇异有序的电荷和自旋相。这个项目应用低能谱的进展来表征这些特殊的自组织电子相，确定它们形成的条件，确定潜在的微观机制，并检验相关理论。该项目还为博士后和本科生提供了低温高分辨率磁光光谱学方面的广泛培训。

项目成果

Crystal-field excitations and vibronic modes in the triangular-lattice spin-liquid candidate TbInO3

三角晶格自旋液体候选 TbInO3 中的晶体场激发和电子振动模式

• DOI: 10.1103/physrevb.104.085102
• 发表时间: 2021
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: Ye, Mai;Xu, Xianghan;Wang, Xiangyue;Kim, Jaewook;Cheong, Sang-Wook;Blumberg, Girsh
• 通讯作者: Blumberg, Girsh

Crystal-field excitations and quadrupolar fluctuations of 4f-electron systems studied by polarized light scattering

• DOI: 10.1088/1742-6596/2164/1/012054
• 发表时间: 2022-03
• 期刊: Journal of Physics: Conference Series
• 作者: M. Ye;H. Kung;P. Rosa;E. Rosenberg;J. Kim;X. H. Xu;E. Bauer;Z. Fisk;I. Fisher;S. Cheong;G. Blumberg

Superconductivity and phonon self-energy effects in Fe1+yTe0.6Se0.4

• DOI: 10.1103/physrevresearch.2.013373
• 发表时间: 2019-11
• 期刊: Physical Review Research
• 影响因子: 4.2
• 作者: S. F. Wu;A. Almoalem;I. Feldman;A. Lee;A. Kanigel;Girsh Blumberg;Girsh Blumberg

Lattice dynamics, crystal-field excitations, and quadrupolar fluctuations of YbRu2Ge2

YbRu2Ge2 的晶格动力学、晶体场激发和四极涨落

• DOI: 10.1103/physrevb.99.235104
• 发表时间: 2019
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: Ye, Mai;Rosenberg, E. W.;Fisher, I. R.;Blumberg, G.
• 通讯作者: Blumberg, G.

Chiral Spin Mode on the Surface of a Topological Insulator

• DOI: 10.1103/physrevlett.119.136802
• 发表时间: 2017-09-27
• 期刊: PHYSICAL REVIEW LETTERS
• 影响因子: 8.6
• 作者: Kung, H-H.;Maiti, S.;Blumberg, G.
• 通讯作者: Blumberg, G.