Infrared Spectroscopy of High-Tc Superconductors in High Magnetic Field

强磁场中高温超导体的红外光谱

• 批准号: 0240194
• 负责人: Dimitri Basov
• 金额: $ 31.5万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-03-01 至 2007-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0240194&HistoricalAwards=false
• 关键词: Infrared; Spectroscopy; Tc; Superconductors; Magnetic

This individual investigator project is focused on investigations of the electrodynamics of high-Tc superconductors in high magnetic fields using infrared (IR) spectroscopy. Through the use of systematic spectroscopic measurements, in a challenging parameter space involving high magnetic fields, low temperature, IR frequencies, it is expected that some of the long-standing issues in the area of high-Tc superconductivity will be resolved. Proposed measurements will focus on the examination of the vortex state in high-Tc materials, emergence of the electronic transport across the boundary of the insulator-superconductor transition as well as on the investigations of the normal state response in the regime where superconductivity is suppressed by high magnetic field. The integration of research and education within a challenging experimental project will aid the preparation of highly skilled personnel with expertise in the area at the merger of condensed matter physics, optics and materials science. Training of graduates will tremendously benefit from the use of national facilities at the National High Magnetic Field Laboratory. The origin of high-Tc superconductivity in the copper oxides is one of the central unsolved problems in contemporary physics. The search for the high-Tc mechanism involves a large fraction of the condensed matter community and has already led to entirely new concepts in condensed matter science. New initiatives described in this proposal will significantly advance our present understanding of the high-Tc phenomenon by way of addressing critically important questions. Specifically, the proposed program is aimed at detailed investigations of the electrodynamics of high-Tc superconductors in the previously unexplored parameter space involving high magnetic fields, low temperatures and infrared frequency range. The research activities will naturally merge the boundaries of condensed matter physics, optics and material science. This particular combination has been identified as "critical enabler" of future technology that "promises to have a pervasive impact on life in the 21st century" in a recent report of the National Research Council. This challenging research program will serve as a unique training ground for graduate students. NSF funding will broaden participation of groups currently underrepresented in graduate education.

该个人研究项目的重点是利用红外光谱研究高tc超导体在高磁场中的电动力学。通过系统的光谱测量，在高磁场、低温、红外频率等具有挑战性的参数空间中，有望解决高tc超导领域一些长期存在的问题。建议的测量将集中在检查高tc材料中的涡旋状态，跨越绝缘体-超导体过渡边界的电子输运的出现，以及研究超导性被高磁场抑制的状态下的正常状态响应。在一个具有挑战性的实验项目中整合研究和教育将有助于在凝聚态物理，光学和材料科学合并的领域培养具有专业知识的高技能人才。毕业生的培训将极大地受益于使用国家高磁场实验室的国家设施。铜氧化物中高温超导性的起源是当代物理学中尚未解决的核心问题之一。对高tc机制的探索涉及到凝聚态物质界的很大一部分，并且已经导致了凝聚态物质科学中全新的概念。本提案中描述的新举措将通过解决至关重要的问题，大大推进我们目前对高tc现象的理解。具体而言，该计划旨在详细研究高tc超导体在先前未开发的参数空间中的电动力学，包括高磁场，低温和红外频率范围。这些研究活动将自然地融合凝聚态物理、光学和材料科学的界限。在美国国家研究委员会（National Research Council）最近的一份报告中，这种特殊的组合被认为是未来技术的“关键推动者”，“有望对21世纪的生活产生广泛影响”。这个具有挑战性的研究项目将为研究生提供一个独特的训练基地。国家科学基金会的资助将扩大目前在研究生教育中代表性不足的群体的参与。