Electronic Properties of Transition Metal Oxides and f-Electron Superconductors

技术：该个人研究人员奖支持关于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的实验研究。磁输运、磁化和扭矩测量将在广泛的温度、磁场和静水压力范围内用于这些单晶和异质结构的研究。这项拟议的研究将大大加强我们对铜酸盐、f电子超导体和锰氧化物中电荷传导的基本理解，并将解决超导和磁性之间相互作用的相关问题。了解这些复杂材料中固有的电子传输和磁传输机制可能是了解这些材料奇怪的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能为适当的掺杂方案提供洞察，以促进铜酸盐和锰氧化物在电子传感器和设备(如磁场传感器甚至计算机逻辑设备)中的应用。这项拟议的工作以一种新颖的方式探索了与这一潜在效用直接相关的一个量：磁导性。这个高度跨学科的项目将允许包括研究生、本科生、博士后和来访者在内的各种研究人员从接触各种重要的实验技术和各种不同的物理系统和现象中受益。该研究项目参与者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大优势，对未来在工业、政府或学术界的职业生涯有利。与罗马尼亚、西班牙和中国的科学家进行的国际合作，需要执行该项目的一部分，为国家的研究和教育基础设施做出贡献。非技术：这项实验研究项目涉及几种以层状形成的外来材料的不同寻常的电磁特性和行为。这些层具有从磁性到超导再到磁性/超导体异质结构的各种性质。这项拟议的研究将大大加强我们对新型超导体和磁性材料中电荷传导的基本理解，并将解决与超导和磁性之间相互作用有关的问题。了解这些复杂材料中固有的电子传输和磁传输机制可能是了解这些材料奇怪的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能会为高温超导体和新型磁性材料在电子传感器和器件(如磁场传感器甚至计算机逻辑器件)中的应用提供帮助。该项目将有助于培养研究生、本科生、博士后和来访者，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。尤其是，本研究涉及从事论文研究并接受对未来职业生涯有益的优秀培训的少数族裔研究生。

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.