Physics Near the Kondo Insulator Fixed Point

近藤绝缘子定点附近的物理

• 批准号: 9870034
• 负责人: Zachary Fisk
• 金额: $ 5万
• 依托单位: Florida State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-01 至 1999-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9870034&HistoricalAwards=false
• 关键词: Physics; Near; Kondo; Insulator; Fixed

9870034 Fisk This experimental condensed matter physics project investigates ground states which lie near the Kondo insulator ground state, which has a ratio of conduction electron concentration to occupied magnetic orbitals e/f = 1. The hypothesis being investigated is that intermediate valence states lie near e/f = 1, as well as the heavy Fermion superconducting state. The experimental program will study doped UBe13, CeIn3 under pressure, the alloy series Sr1-xSmx B6 and single crystals of various intermediate valence materials. Temperature dependent transport, thermodynamic and optical properties will be studied. The research provides excellent training for graduate students in the areas of materials synthesis and characterization. %%% This experimental condensed matter physics program seeks to understand how the loss of magnetism in a compound, happening through changing pressure applied to the compound or changing the chemistry of the compound, leads to essentially new properties of such compounds, most notably superconductivity. The hypothesis around which the experiments are organized is that the most interesting physical properties occur near where the number of charge carriers equals the number of magnetic sites in the compound. Magnetic, electrical and optical properties are measured. The work is addressing questions important to the physics of high temperature superconductivity, as well as exotic magnetically based superconductors and insulators. The research provides excellent training for graduate students in the areas of materials synthesis and characterization. ***

9870034 FISK这个实验凝聚态物理项目研究了近藤绝缘体基态附近的基态，近藤绝缘体基态的传导电子浓度与占据的磁轨道之比为e/f=1。正在研究的假设是中间价态位于e/f=1附近，以及重费米子超导态。该实验项目将研究加压掺杂的UBe13、CeIn3、合金系列SR1-xSmxB6和各种中间价材料的单晶。我们将研究与温度有关的输运、热力学和光学性质。这项研究为研究生在材料合成和表征领域提供了出色的培训。这个实验凝聚态物理程序试图了解化合物中的磁性损失是如何通过改变施加到化合物上的压力或改变化合物的化学物质而导致此类化合物本质上的新性质的，最显著的是超导电性。组织实验的假设是，最有趣的物理性质发生在电荷载流子数量与化合物中磁性位置数量相等的地方。测量了薄膜的磁学、电学和光学性质。这项工作正在解决高温超导物理中的重要问题，以及奇异的磁基超导体和绝缘体。这项研究为研究生在材料合成和表征领域提供了出色的培训。***