U.S.-Japan Cooperative Science: High-Resolution Angle-Resolved Photoemission Study of High Tc Superconductors

9726550该奖项支持芝加哥伊利诺伊大学的Juan Carlos Campuzano教授和日本东北大学的Takashi Takahashi教授之间为期三年的合作研究项目。研究人员将对高T_c超导体进行高分辨率角度分辨光电子能谱研究。他们将研究高温超导的一个领域，以及与某些超导梯形化合物的维度有关的基本问题。这项研究的主要目的是利用日本正在开发的、目前在美国还没有的新材料来扩展他们目前的实验。日本拥有最先进的设备，将允许调查目前对凝聚态物理感兴趣的问题，例如维度和非费米液体行为之间的联系，以及自旋间隙行为和赝隙的存在之间的联系。美国将详细研究光电子发射特性的动量依赖关系和光子能量依赖关系，日本将进行极端能量分辨率实验。该项目汇集了两个拥有互补专业知识、研究能力和设备的实验室的努力。美国研究人员拥有超高分辨率能力，但没有频率调谐，而日本拥有可用的最高分辨率光谱仪，加上可用的最高强度源。来自两国的年轻研究人员将大量参与这项研究。通过思想和技术的交流，这个项目将扩大我们的基础知识基础，促进国际理解与合作。***

9726550 Campuzano This award supports a three year collaborative research project between Professor Juan Carlos Campuzano of the University of Illinois in Chicago and Professor Takashi Takahashi of Tohoku University in Japan. The researchers will undertake a high-resolution angle-resolved photoemission study of high Tc superconductors. They will research an area of high temperature superconductivity as well as fundamental questions related to dimensionality in certain superconducting ladder compounds. The main objective of the research is to extend their current experiments with new materials being developed in Japan, and currently not available in the U.S. The Japanese have state- of-the-art equipment that will allow for investigation of problems of current interest in condensed matter physics, such as the connection between dimensionality and non-Fermi liquid behavior, and the connection between spin gap behavior and the presence of a pseudogap. Detailed momentum dependence and photon energy dependence of the photoemission features will be investigated in the U.S. and extreme energy resolution experiments will be carried out in Japan. This project brings together the efforts of two laboratories that have complementary expertise, research capabilities and equipment. The U. S. researchers have ultra-high resolution capabilities but no frequency tuning, while the Japanese have the highest resolution spectrometer available, coupled with the highest intensity source available. Young investigators, from both countries, will be significantly involved in the research. Through the exchange of ideas and technology, this project will broaden our base of basic knowledge and promote international understanding and cooperation. ***