II-VI Semiconductors, Diluted Magnetic Semiconductors (DMS) and their Superlattices

这一奖项来自材料研究部材料研究组(MRG)项目，将支持普渡大学关于II-VI半导体、稀磁半导体(DMS)及其亚微米异质结构的多研究者、多学科研究计划。DMS物质表现出的半导体和磁性的独特组合，以及II-VI半导体中可用的宽带隙，为新材料和技术提供了长期的潜力。普渡大学的MRG活动由R.L.Gunshor教授和A.K.Ramdas教授领导，圣母大学J.Furdyna教授的研究小组也参与其中。根据该计划，将进行全面的材料准备、设计和制造，以及一系列物理测量和理论研究。这些研究包括光谱研究(拉曼、布里渊、红外、光致发光、压电和光调制反射率)；透射式电子显微镜；以及法拉第效应和相关的磁光研究。在晶体生长设备中生长的大块晶体以及在分子束外延和原子层外延设备中生长的亚微米异质结构将被特别准备，以解决在基础材料科学和工程背景下的重要问题，并具有引领新技术和设备的潜力。集体和局域激发(振动、电子、磁)；亚微米异质结构中界面的性质；亚微米结构中激发的新方面；交换相互作用、磁有序和量子井物理都是普渡磁阻研究活动范围内广泛物理问题的说明性例子。

This award from the Materials Research Group (MRG) Program of the Division of Materials Research will support a multi-investigator, multi-disciplinary research program at Purdue University on II-VI semiconductors, diluted magnetic semiconductors (DMS), and their sub-micron heterostructures. The unique combination of semiconducting and magnetic properties exhibited by DMS substances and the wide band gaps available in II-VI semiconductors offer long-term potential for new materials and technology. The MRG activity at Purdue University is headed by Professors R.L. Gunshor and A.K. Ramdas, and also involves the research group of Professor J. Furdyna at Notre Dame. Comprehensive materials preparation, design, and fabrication, as well as a range of physical measurements and theoretical studies will be carried out under the program. These include spectroscopic studies (Raman, Brillouin, infrared, photoluminescence, piezo- and photo-modulated reflectivity); transmission electron microscopy; and Faraday effect and related magneto-optic investigations. Bulk crystals grown in the crystal growth facility as well as sub-micron heterostructures grown in Molecular Beam Epitaxy and Atomic Layer Epitaxy facilities will be specially prepared to address issues important in the context of basic materials science and engineering, and with potential for leading to new technology and devices. Collective and localized excitations (vibrational, electronic, magnetic); the nature of the interfaces in sub-micron heterostructures; the novel aspects of the excitations in the sub-micron structures; exchange interaction, magnetic ordering, and the physics of quantum wells are illustrative examples of the wide range of physical problems within the scope of the Purdue MRG activity.