Inter-American Materials Collaboration (CIAM): West Virginia University - Pontificia Universidad Catolica de Chile Collaboration on Multifunctional Materials

这个MWN(材料世界网络)项目是西弗吉尼亚大学和智利加多利卡大学(PUC)联合开展的研究和教育活动。该项目解决了铁电、磁性和传统半导体纳米结构与基于通过异质结构获得的新的或增强的电子性能的器件相结合所涉及的材料科学问题。正在解决的主要研究问题是：在半导体上外延生长高质量材料(反之亦然)，以及铁电或磁/半导体界面的控制。该方法利用分子束外延在GaN上生长铁电、磁性或其他多功能层，而不会使表面暴露在大气污染物中。该生长装置还将与现有的超高真空扫描探针显微镜和X射线光电子能谱能力相结合。这将有助于研究GaN上的初始层形核，并为建立对界面的基本理解提供信息，展示铁电层的外延生长，并允许将磁性多层膜集成到这样的混合系统中。其他正在解决的问题是分子吸附对铁电/半导体多功能器件的影响。智利大学物理系提供的具有亚微米空间分辨率的成像拉曼光谱、椭偏测量、X射线光电子能谱、光谱学和电力显微镜将用于在微观水平上探测材料的性质。该项目解决与具有技术相关性的电子和光子材料相关的基础研究问题。该项目的一个重要特点是对教育的高度重视，强调研究和教育的一体化，以及提供科学和教育益处的国际合作。该项目将与PUC的科学家建立强有力的合作，其中将包括西弗吉尼亚大学(WVU)和智利加托利卡大学(PUC)之间的本科生和研究生交流。本科生不仅将在学年期间积极参与研究项目，还将有机会在PUC度过很大一部分暑假，为他们提供文化沉浸和认真的科学体验。研究生也将参与研究，并将能够访问临市局，以协调我们的实验室工作。从长远来看，该计划将帮助西弗吉尼亚大学吸引合格的学生，特别是将加强西弗吉尼亚大学代表不足的少数族裔的宣传努力，特别是针对拉美裔学生的努力。此外，它还将产生新的知识，这些知识有朝一日可能被用来制造更高效的电子传感器和数据存储设备。

This MWN (Materials World Network) project is a joint research and education activity between West Virginia University and Pontificia Universidad Catolica de Chile (PUC). The project addresses materials science issues involved in the combination of ferroelectric, magnetic and traditional semiconductor nanostructures with devices based on new or enhanced electronic properties achieved through heterostructures. Primary research issues being addressed are: epitaxial growth of high quality materials on semiconductors (or vice-versa), and control of the ferroelectric or magnetic/semiconductor interface. The approach utilizes MBE growth of ferroelectric, magnetic, or other multifunction layers on GaN without exposing surfaces to atmospheric contaminants. The growth apparatus will also be integrated with existing ultra-high vacuum scanning probe microscopy and x-ray photoelectron spectroscopy capabilities. This will permit investigation of initial layer nucleation on GaN and provide information to establish a fundamental understanding of the interface, demonstrate epitaxial growth of ferroelectric layers, and allow integration of magnetic multilayers into such hybrid systems. Other issues being addressed are the effects of molecular adsorption on ferroelectric/semiconductor multifunctional devices. Imaging Raman spectroscopy with sub-micrometer spatial resolution, ellipsometry, x-ray photoemission, spectroscopy, and electric force microsopy, available at the Pontificia Universidad Catolica de Chile (PUC) Physics Department, will be used to probe materials properties on a microscopic level. %%% The project addresses fundamental research issues associated with electronic and photonic materials having technological relevance. An important feature of the project is the strong emphasis on education, stressing integration of research and education, and an international collaboration providing both scientific and educational benefits. The project will establish a strong collaboration with PUC scientists that will include exchange of undergraduate and graduate students between West Virginia University (WVU) and Pontificia Universidad Catolica de Chile (PUC). Undergraduate students will not only actively participate in the research program during the academic year, but will also have the opportunity to spend a significant portion of the summers at PUC, providing them with cultural immersion combined with a serious scientific experience. Graduate students will also participate in the research and will be able to visit PUC to coordinate our laboratory efforts. In the long term, this program will aid WVU in attracting qualified students, and in particular, will reinforce WVU's underrepresented minority outreach efforts, especially those directed toward Latino students. In addition, it will also result in new knowledge that could someday be used to fabricate more efficient electronic sensors and data storage devices.