CAREER: Correlations Between Local Structure and Electron Transport in Transition-Metal Oxides

职业：过渡金属氧化物中局域结构与电子传输之间的相关性

• 批准号: 9733862
• 负责人: Trevor Tyson
• 金额: $ 30万
• 依托单位: New Jersey Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-06-01 至 2002-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9733862&HistoricalAwards=false
• 关键词: CAREER; Correlations; Between; Local; Structure

9733862 Tyson This is a CAREER award to an African-American scientist at an urban university with a large enrollment of students from underrepresented groups. The project will study high temperature superconducting materials such as yttrium barium copper oxide (YBCO), and its praseodymium- and terbium-doped variants. The critical temperature and ground state resistivity of YBCO are altered significantly by exposure to optical radiation (photodoping), by application external of pressure, by changes in the oxygen content and by the replacement of yttrium by praseodymium or terbium. However, the relation of these changes in electron transport to local local atomic order is poorly understood. The project addresses this issue by correlating transport properties with changes in the local structure of oriented bulk materials, oriented films and single crystals as determined by x-ray absorption spectroscopy. This should provide fundamental information about the superconducting state in these multinary oxide materials. The project will integrate work at NJIT laboratories with off-site research at national synchrotron light laboratories. Graduate, undergraduate, and high school students will conduct the research. The educational component of the project will expose undergraduates, high school students and teachers to modern research techniques. The PI is developing a research and teaching program targeted at Newark area high school students and NJIT undergraduates. It involves an undergraduate laboratory with advanced experimental methods and techniques, which link basic science training with research on transition metal oxides. %%% This is a CAREER award to an African-American scientist at an urban university with a large enrollment of students from underrepresented groups. The research will investigate the atomic structure in several high-temperature supercon ductor materials. Among other applications, these materials show promise to lead to low-loss power transmission lines at temperatures approaching room temperature. The mechanism for superconductivity in these materials is still not understood. To shed light on this problem, the project attempts to determine what atomic structural characteristics are correlated with the superconductivity and other transport properties in these materials. The research program integrates work at NJIT with off-site reserach at national research laboratories, such as synchrotron light sources. Graduate, undergraduate, and high school students will conduct the research. The educational component of the project will expose undergraduates, high school students and teachers to modern research techniques. The PI is developing a research and teaching program targeted at Newark area high school students and NJIT undergraduates. It involves an undergraduate laboratory with advanced experimental methods and techniques, which link basic science training with research on transition metal oxides. ***

9733862泰森（Tyson）这是一所城市大学的非裔美国科学家的职业奖，其中大量来自人为人数不足的学生。该项目将研究高温超导材料，例如Yttrium钡氧化铜（YBCO）及其praseodymium-和Terbium掺杂的变体。 YBCO的临界温度和基态电阻率通过接触光辐射（光辐射），通过施加压力，通过氧气含量的变化以及通过praseodymium或terbium替换Yttrium来显着改变。但是，这些变化在电子传输到局部原子秩序中的关系知之甚少。 该项目通过将传输特性与通过X射线吸收光谱确定的定向散装材料，定向膜和单晶的局部结构的变化相关联，解决了这一问题。这应该提供有关这些多氧化物材料中超导状态的基本信息。该项目将将NJIT实验室的工作与国家同步灯实验室的现场研究相结合。 研究生，本科和高中生将进行研究。该项目的教育组成部分将使本科生，高中生和老师接触现代研究技术。 PI正在开发针对纽瓦克地区高中学生和NJIT本科生的研究和教学计划。它涉及具有先进的实验方法和技术的本科实验室，该实验室将基础科学培训与过渡金属氧化物的研究联系起来。 %%％这是一个城市大学的非裔美国科学家的职业奖，其中大量来自代表人数不足的学生。该研究将研究几种高温超孔管材料中的原子结构。 在其他应用中，这些材料有望在接近室温的温度下导致低损耗的电力传输线。这些材料中超导性的机制仍然尚不清楚。为了阐明这个问题，该项目试图确定哪些原子结构特征与这些材料中的超导性和其他运输特性相关。 该研究计划将NJIT的工作与国家研究实验室的现场再生（例如Synchrotron Light Sources）相结合。 研究生，本科和高中生将进行研究。该项目的教育组成部分将使本科生，高中生和老师接触现代研究技术。 PI正在开发针对纽瓦克地区高中学生和NJIT本科生的研究和教学计划。它涉及具有先进的实验方法和技术的本科实验室，该实验室将基础科学培训与过渡金属氧化物的研究联系起来。 ***