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：该项目支持对电子掺杂高温超导体的正常状态性质的实验研究，主要使用多种运输技术。对正常状态运输特性的理解有望使人们对高温超导性的原因有了更基本的了解，这是凝结物理学的主要未解决问题。与孔掺杂的相比，对电子掺杂的超导体的研究较少，并且必须通过任何最终的高-TC超导性理论来解释其性能。该项目的实验将集中于量子临界行为的研究，这是掺杂，压力，温度和磁场的函数。希望这些实验能够阐明高-TC材料中量子关键性和超导性之间的关系。该项目集成了研究和教育，以便在现代冷凝物质实验技术中培训学生和博士后研究人员。学生和博士后还将与其他机构进行合作研究。此外，它们将接受薄膜和单晶生长方法的训练，在美国越来越稀缺的重要研究技能。没有技术：该项目的重点是发现引起高温超导性的关键因素，这些因素是凝结物理学的最重要的未解决问题之一。对高温超导性的理解可能会深入了解室温超导体的创建，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多种新型的电气传输技术来探测高温超导体的特性，这是参数的函数，例如磁场，化学掺杂和压力。人们认为这些参数会导致高温超导体发生量子相变。据信与该量子相变相关的特殊特性会导致高温超导性本身，尽管确切的发生方式尚不清楚。该项目集成了研究和教育，以便在现代冷凝物质实验技术中培训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增长方法的培训，这些研究技能在美国稀缺。这些受训者学到的所有技术都将为学术界，国家实验室和行业的职业做好准备。