Towards Quantitative Photoemission Experiments

迈向定量光电发射实验

• 批准号: 0604701
• 负责人: Zhi-Xun Shen
• 金额: $ 39万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-09-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0604701&HistoricalAwards=false
• 关键词: Towards; Quantitative; Photoemission; Experiments

Non-Technical:Novel tools have long played a pivotal role in scientific discoveries. Angle-resolved photoemission spectroscopy (ARPES), derived from Einstein's idea of photoelectric effect, is such a tool that yields direct and unique information about the microscopic behavior of electrons inside solids. It provides what we need the most to understand the physical properties of a solid: the direction, speed, and collision processes of electrons. Over the last two decades, the improved resolution has allowed this technique to influence some of the most important physics questions today, for example the high-temperature superconductivity. The objective of the proposed program is to bring the ARPES experiment to an even higher level, towards becoming a quantitative tool to gain information that cannot be obtained by other means. This higher precision measurement capability will help expand the "universe for discoveries". This program will yield the following broad benefits: i) development of new measurement capability and methodology will benefit a broader scientific community; ii) training graduate and undergraduate students through collaborative and interdisciplinary research; iii) communication of key results to world-wide community to advance our understanding of novel solids; iv) some of the techniques developed may find industrial applications in the future.Technical:Angle-resolved photoemission spectroscopy (ARPES) has emerged as a leading experimental tool to investigate condensed matter systems, in particular the complex materials exemplified by the high-temperature superconductors. The progress during the last two decades was made possible by a confluence of important scientific ideas, advancement in instrumentation, discovery of new materials and sophisticated data analysis technique. Looking towards the future, ARPES is expected to have even bigger impact in condensed matter physics by exploring new materials and testing new ideas. The objective of the proposed program is to bring the ARPES experiment to an even higher level, towards becoming a quantitative tool to probe the electronic structure of complex materials and to gain information that cannot be obtained by other means. The method is a combined effort on instrumentation development and experimental measurement. Specifically, it is proposed: i) to further advance the experimental capabilities, including efforts toward sub-meV resolution; ii) to perform in depth study of model systems; iii) to investigate strongly correlated materials, exemplified by the cuprates and manganties.

非技术性：新工具长期以来在科学发现中发挥着关键作用。 角分辨光电子能谱（ARPES），源于爱因斯坦的光电效应的想法，是这样一个工具，产生直接和独特的信息，微观行为的电子在固体。 它提供了我们理解固体物理性质最需要的东西：电子的方向，速度和碰撞过程。 在过去的二十年里，分辨率的提高使这项技术能够影响当今一些最重要的物理问题，例如高温超导性。 拟议计划的目标是将ARPES实验提升到更高的水平，成为一种定量工具，以获得无法通过其他手段获得的信息。 这种更高精度的测量能力将有助于扩大“发现的宇宙”。 该计划将产生以下广泛的好处：i）新的测量能力和方法的发展将有利于更广泛的科学界; ii）通过合作和跨学科研究培训研究生和本科生; iii）将关键成果传达给世界各地的社区，以促进我们对新型固体的理解; iv）开发的一些技术可能会在未来找到工业应用。技术：角分辨光电子能谱（ARPES）已成为研究凝聚态系统，特别是高温超导体等复杂材料的主要实验工具。 在过去的二十年里，重要的科学思想、仪器的进步、新材料的发现和复杂的数据分析技术的融合使这一进展成为可能。展望未来，ARPES有望通过探索新材料和测试新想法在凝聚态物理学中产生更大的影响。 该计划的目标是使ARPES实验达到更高的水平，成为探测复杂材料电子结构的定量工具，并获得无法通过其他手段获得的信息。 该方法是仪器开发和实验测量的综合努力。 具体而言，建议：i）进一步提高实验能力，包括亚meV分辨率的努力; ii）对模型系统进行深入研究; iii）调查强相关材料，例如铜酸盐和锰。