Japan JSPS Program: NMR Studies of Low-Dimensional Correlated Electron Systems

雷基亚9724757 该奖项支持日本科学促进协会（JSPS）在日本东京大学为Charles Recchia博士提供为期24个月的博士后奖学金。Recchia博士将与固体物理研究所物理学教授Masashi Takigawa博士合作开展一项名为“低维相关电子系统的NMR研究”的研究项目。" 拟议的研究将侧重于使用核磁共振（NMR）来探测与高温超导体相关的一类新材料。 这些被称为“阶梯化合物”的新材料可能为研究人员提供有关奇异超导性机制的重要线索。 确定了高温超导体的关键结构元素是铜和氧的二维平面。 置于铜原子上的电子自旋引起短程磁序耦合，这是一种被认为是超导性关键的基本波动。 关于这种电子耦合的详细性质以及它如何产生超导性，仍然存在争议。 为了解决这些问题，研究人员现在正在研究含有铜和氧的有限宽度“阶梯”的样品，但理想的铜活性的有限宽度仍然不清楚。 这项研究的主要目标是利用NMR技术的最新进展来确定这些“梯子”的理想宽度，从而更深入地了解新型低维材料中的电子耦合过程。 ***

Recchia 9724757 This award supports a 24 month Japan Society for the Promotion of Science (JSPS) Postdoctoral Fellowship for Dr. Charles Recchia at the University of Tokyo, Tokyo,Japan. Dr. Recchia will work with Dr. Masashi Takigawa, Professor of Physics at the Institute of Solid State Physics, on a research project entitled, "NMR Studies of LowDimensional Correlated Electron Systems." The proposed research will focus on the use of nuclear magnetic resonance (NMR) to probe a new class of materials related to hightemperature superconductors. These new materials, known as "ladder compounds," may provide researchers with important clues as to the mechanisms that are responsible for exotic superconductivity. It is determined that the crucial structural elements in high temperature superconductors are two dimensional planes of copper and oxygen. Electronic spins placed on copper atoms causes a short-range magnetic order coupling, a basic fluctuation that is thought to be the key to superconductivity. Controversy remains regarding the detailed nature of this electronic coupling and how it gives rise to superconductivity. In an effort to resolve these issues, researchers are now investigating samples that contain finite width "ladders" of copper and oxygen, but the finite width appropriate to ideal superconductive activity remains unclear. The primary goal of the research is to use recent advances in NMR techniques to identify the idealwidth of these "ladders" and, thus, provide a far deeper understanding of the electronic coupling process in novel lowdimensional materials. ***