Electronic Properties of Electron-Doped Oxide Superconductors.

电子掺杂氧化物超导体的电子特性。

• 批准号: 0653535
• 负责人: richard greene
• 金额: --
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-08-01 至 2011-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0653535&HistoricalAwards=false
• 关键词: Electronic; Properties; Electron; Doped; Oxide

Technical:This project supports an experimental investigation of the normal state properties of electron-doped high-temperature superconductors, primarily using a wide variety of transport techniques. An understanding of the normal state transport properties is expected to lead to a more fundamental understanding of the cause of high-temperature superconductivity, a major unsolved problem of condensed matter physics. The electron-doped superconductors are less well studied than their hole-doped counterparts and their properties must be explained by any final theory of high-Tc superconductivity. The experiments in this project will focus on a study of quantum critical behavior as a function of doping, pressure, temperature and magnetic field. It is hoped that the relationship between quantum criticality and superconductivity in the high-Tc materials will be elucidated by these experiments. This project integrates research and education in order to train students and postdoctoral researchers in modern condensed matter physics experimental techniques. The students and postdocs will also be involved in collaborative research with other institutions. Furthermore, they will be trained in thin film and single crystal growth methods, important research skills that are increasingly scarce in the United States.Non-Technical:This project is focused on discovering the key factors which cause high-temperature superconductivity, one of the most important unsolved problems of condensed matter physics. An understanding of high-temperature superconductivity may give insight into the creation of room temperature superconductors, materials that would have a significant technological and economic impact. An important aspect of this project is the use of a wide range of novel electrical transport techniques to probe the properties of high-temperature superconductors as a function of parameters, such as magnetic field, chemical doping, and pressure. It is thought that these parameters cause high-temperature superconductors to undergo a quantum phase transition. Special properties associated with this quantum phase transition are believed to cause the high-temperature superconductivity itself, although exactly how this happens is not understood. This project integrates research and education in order to train students and postdoctoral researchers in modern condensed matter physics experimental techniques. These young researchers will also be trained in thin film and crystal growth methods, important research skills that are scarce in the United States. All the techniques learned by these trainees will prepare them for careers in academe, national laboratories, and industry.

技术：该项目支持电子掺杂高温超导体正常状态特性的实验研究，主要使用各种各样的传输技术。对正常态输运性质的理解有望导致对高温超导性原因的更基本的理解，高温超导性是凝聚态物理学的一个主要未解决的问题。电子掺杂的超导体比空穴掺杂的超导体研究得更少，它们的性质必须由任何最终的高Tc超导理论来解释。该项目的实验将侧重于研究量子临界行为作为掺杂，压力，温度和磁场的函数。希望通过这些实验能够阐明高温超导材料中量子临界性和超导性之间的关系。该项目将研究与教育相结合，以培养现代凝聚态物理实验技术的学生和博士后研究人员。学生和博士后也将参与与其他机构的合作研究。此外，他们还将接受薄膜和单晶生长方法的培训，这是美国日益稀缺的重要研究技能。非技术性：该项目的重点是发现导致高温超导性的关键因素，这是凝聚态物理学最重要的未解决问题之一。对高温超导性的理解可能会让我们深入了解室温超导体的创造，这些材料将产生重大的技术和经济影响。该项目的一个重要方面是使用广泛的新型电输运技术来探测高温超导体的特性作为参数的函数，如磁场，化学掺杂和压力。人们认为这些参数导致高温超导体发生量子相变。与这种量子相变相关的特殊性质被认为是导致高温超导性本身的原因，尽管这到底是如何发生的还不清楚。该项目将研究与教育相结合，以培养现代凝聚态物理实验技术的学生和博士后研究人员。这些年轻的研究人员还将接受薄膜和晶体生长方法的培训，这是美国稀缺的重要研究技能。这些学员学到的所有技术将为他们在学术界、国家实验室和工业界的职业生涯做好准备。