High Resolution Crystallographic Studies (Chemistry)

在Coppens博士的指导下，这项研究将广泛使用国家同步加速器光源和康奈尔高能同步加速器源的同步辐射设备。一个主要的努力将集中在调制固体的结构分析，其中三维对称是由不相称的调制波的叠加修改。这种调制可以强烈地影响诸如电导率之类的物理性质。此外，Coppens博士将进一步发展他在纽约州立大学布法罗分校的实验室的实验能力，以进行低温测量。这种能力将通过允许以更系统的方式进行初步测量来补充同步加速器设施的工作。这项关于分子晶体中电子密度和相变的研究有望在几个领域提供新的基础见解。特别是对导电性和超导性的认识还不完全。这些研究可能会影响电子设备或高温超导体新材料的寻找。

The research under the direction of Dr. Coppens will make extensive use of the synchrotron radiation facilities at the National Synchrotron Light Source and at the Cornell High Energy Synchrotron Source. A major effort will focus on the structural analysis of modulated solids, in which the three-dimensional symmetry is modified by superposition of incommensurate modulation waves. Such modulations can strongly affect physical properties such as electrical conductivity. In addition Dr. Coppens will develop further the experimental capability of his laboratory at SUNY-Buffalo to carry out low temperature measurements. This capability will complement the work at the synchrotron facilities by permitting preliminary measurements to be carried out in a more systematic manner. This research activity on electron densities and phase transitions in molecular crystals is expected to provide new fundamental insights in several areas. In particular, the understanding of electrical conductivity and superconductivity is still not complete. These studies could impact the search for new materials for electronic devices or for high temperature superconductors.