Electronic Properties of Transition Metal Oxides and f-Electron Superconductors

过渡金属氧化物和f电子超导体的电子性质

• 批准号: 0705959
• 负责人: Carmen Almasan
• 金额: $ 33.6万
• 依托单位: Kent State University
• 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: 2007-07-01 至 2011-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0705959&HistoricalAwards=false
• 关键词: Electronic; Properties; Transition; Metal; Oxides

Technical: This individual investigator award supports experimental investigations on charge conduction and magnetic response in manganites and in the quantum critical region of high temperature superconductors and heavy electron superconductors, as well as on the proximity effect and spin injection in ferromagnetic/superconductor heterostructures. Magnetotransport, magnetization, and torque measurements over a wide range of temperature, magnetic field, and hydrostatic pressure will be employed for these studies on single crystals and heterostructures. The proposed research will significantly enhance our fundamental understanding of charge conduction in cuprates, f-electron superconductors, and manganites, and will also address issues related with the interplay between superconductivity and magnetism. Understanding the intrinsic electronic transport and magnetotransport mechanisms in these complex materials may be one of the key components in understanding of curious and potentially useful physical properties of these materials. More broadly, the results from these basic investigations may provide insight into appropriate doping schemes to facilitate applications of cuprates and manganites to electronic sensors and devices such as magnetic field sensors or even computer logic devices. The proposed work explores, in a novel way, a quantity of direct relevance to this potential utility: the magnetoconductivity. This highly interdisciplinary project will allow a wide-variety of researchers including graduate students, undergraduates, postdocs, and visitors to benefit from exposure to a diversity of important experimental techniques, and a variety of different physical systems and phenomena. The diversity of the expertise gained by the participants in this research program is a substantial advantage in today's knowledge based, technology driven economy, being beneficial to a future career in industry, government, or academia. The international collaborations with scientists in Romania, Spain, and China, needed to carry out parts of this project contribute to the nation's infrastructure for research and education. Non-Technical: This experimental research project concerns the unusual electrical and magnetic properties and behavior of several exotic materials formed in layers. The layers have properties ranging from magnetic to superconducting to magnetic/superconductor heterostructures. The proposed research will significantly enhance our fundamental understanding of charge conduction in new types of superconductors, and magnetic materials, and will also address issues related with the interplay between superconductivity and magnetism. Understanding the intrinsic electronic transport and magnetotransport mechanisms in these complex materials may be one of the key components in understanding of curious and potentially useful physical properties of these materials. More broadly, the results from these basic investigations may provide insight which will facilitate applications of high temperature superconductors and new magnetic materials to electronic sensors and devices such as magnetic field sensors or even computer logic devices. The project will contribute to the training of graduate students, undergraduates, postdocs, and visitors, who will be exposed to a diversity of experimental techniques, and a variety of different physical systems and phenomena In particular, this research involves minority-group graduate students who pursue thesis research and receive excellent training beneficial to their future career.

技术支持：该个人研究者奖支持对锰氧化物中的电荷传导和磁响应以及高温超导体和重电子超导体的量子临界区域的实验研究，以及铁磁/超导体异质结构中的邻近效应和自旋注入。磁输运，磁化强度和扭矩测量在很宽的温度范围内，磁场，和静水压力将用于这些研究单晶和异质结。拟议的研究将大大提高我们对铜酸盐，f-电子超导体和锰氧化物中电荷传导的基本理解，并将解决与超导性和磁性之间相互作用相关的问题。 了解这些复杂材料中的固有电子输运和磁输运机制可能是了解这些材料的好奇和潜在有用的物理性质的关键组成部分之一。更广泛地说，这些基础研究的结果可以提供对适当掺杂方案的洞察，以促进铜酸盐和锰氧化物在电子传感器和器件（例如磁场传感器或甚至计算机逻辑器件）中的应用。拟议的工作探索，在一个新的方式，直接相关的数量，这种潜在的效用：磁导率。这个高度跨学科的项目将允许各种各样的研究人员，包括研究生，本科生，博士后和访客，从接触到重要的实验技术的多样性，以及各种不同的物理系统和现象中受益。参与者在这项研究计划中获得的专业知识的多样性是当今以知识为基础，技术驱动的经济中的一个重大优势，有利于未来在工业，政府或学术界的职业生涯。与罗马尼亚、西班牙和中国的科学家进行的国际合作，需要开展该项目的部分工作，为国家的研究和教育基础设施做出贡献。非技术：这个实验研究项目涉及几种层中形成的奇异材料的不寻常的电磁特性和行为。 这些层具有从磁性到超导到磁性/超导体异质结构的性质。拟议的研究将大大提高我们对新型超导体和磁性材料中电荷传导的基本理解，并将解决与超导性和磁性之间相互作用有关的问题。 了解这些复杂材料中的固有电子输运和磁输运机制可能是了解这些材料的好奇和潜在有用的物理性质的关键组成部分之一。更广泛地说，这些基础研究的结果可以提供洞察力，这将有助于高温超导体和新的磁性材料应用于电子传感器和设备，如磁场传感器，甚至计算机逻辑设备。该项目将有助于研究生，本科生，博士后和访问者的培训，他们将接触到各种实验技术，以及各种不同的物理系统和现象。特别是，这项研究涉及少数群体研究生，他们从事论文研究，并接受有利于他们未来职业的优秀培训。