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

9733862泰森这是颁发给一所城市大学的一位非裔美国科学家的职业奖项，这所大学的学生来自代表不足的群体。该项目将研究高温超导材料，如氧化钇钡铜氧化物(YBCO)及其掺杂Pr和Tb的变种。YBCO的临界温度和基态电阻率通过暴露于光辐射(光掺杂)、外加压力、改变氧含量以及用Pr或Tb取代Y而显著改变。然而，电子输运的这些变化与局域原子有序之间的关系却知之甚少。该项目通过将传输特性与X射线吸收光谱确定的取向块状材料、取向薄膜和单晶的局部结构的变化相关联来解决这一问题。这应该提供关于这些多元氧化物材料中超导状态的基本信息。该项目将把NJIT实验室的工作与国家同步加速器光实验室的非现场研究结合起来。研究生、本科生和高中生将进行这项研究。该项目的教育部分将使本科生、高中生和教师接触到现代研究技术。PI正在开发一项针对纽瓦克地区高中生和NJIT本科生的研究和教学计划。它包括一个拥有先进实验方法和技术的本科生实验室，将基础科学培训与过渡金属氧化物研究联系起来。这是向一所城市大学的一名非裔美国科学家颁发的职业奖项，该大学招收了大量来自代表不足的群体的学生。这项研究将研究几种高温超导材料的原子结构。在其他应用中，这些材料显示出在接近室温的温度下实现低损耗输电线路的前景。这些材料中超导电性的机制仍不清楚。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和其他输运性质有关。该研究计划将NJIT的工作与国家研究实验室(如同步加速器光源)的非现场研究相结合。研究生、本科生和高中生将进行这项研究。该项目的教育部分将使本科生、高中生和教师接触到现代研究技术。PI正在开发一项针对纽瓦克地区高中生和NJIT本科生的研究和教学计划。它包括一个拥有先进实验方法和技术的本科生实验室，将基础科学培训与过渡金属氧化物研究联系起来。***

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. ***