MRI: Acquisition of a Closed Cycle Cryostat for Low Temperature Optical Microscopy Studies of Dichalcogenides and Topological Insulators at a Predominantly Undergraduate Inst

1337207他技术摘要：这一重大研究仪器奖支持北爱荷华大学(UNI)购买一台闭合循环光学显微镜低温恒温器，用于与Horiba Labram HR拉曼显微镜接口。该组合系统将使材料的变温光学显微镜研究成为可能，如二维二卤化物系统和低维拓扑绝缘体(TIS)。该仪器将使目前的一系列凝聚态主题的研究成为可能，例如电荷密度波和超导电性之间的相互作用，纳米结构中电荷和声子的量子限制效应的物理，低维TIS表面性质的研究，以及在TI纳米结构表面寻找狄拉克锥体的光学特征。该仪器还将被整合到本科生的研究中，并将被纳入大学的三门本科课程。最先进的光学显微镜低温恒温器将极大地拓宽大学的研究和教学范围。非技术摘要：这一重大研究仪器奖支持购买高效制冷系统，用于各种材料的变温光学显微镜研究。该系统将与北爱荷华大学(UNI)物理系的商用拉曼显微镜相结合。该组合系统(拉曼显微镜和制冷系统)将使各种材料的变温光学显微镜研究成为可能，并将加强和扩大大学的研究范围。光学显微镜制冷系统的获得将对大学本科生产生强大的影响。该设备将在三门本科课程中使用，并将使该仪器的覆盖范围扩大到每年约40名大学学生。它还将鼓励更多的学生参与研究活动，并为本科生提供使用世界级研究仪器的低温光学实验的实践经验。

1337207 HeTechnical abstract:This Major Research Instrumentation award supports the University of Northern Iowa (UNI)with the acquisition of a closed cycle optical microscopy cryostat to be interfaced with a Horiba Labram HR Raman Microscope. The combined system will enable variable temperature optical microscopy studies of materials such as 2-dimensional dichalcogenide systems and low dimensional topological insulators (TIs). The instrument will enable studies of a range of current condensed matter topics such as the interplay between charge-density-waves and superconductivity, the physics of quantum confinement effects of charges and phonons in nanostructures, studies of surface properties of low dimensional TIs, and the search for optical signature of Dirac cones on the surface of TI nanostructures. The instrument will also be integrated in undergraduate students research and it will be incorporated in three undergraduate courses at UNI. The state-of-the-art optical microscopy cryostat will significantly broaden the scope of research and teaching at UNI. Non-technical Abstract:This Major Research Instrumentation award supports the acquisition of an efficient refrigeration system for variable temperature optical microscopy studies of diverse materials. The system will be combined with a commercial Raman microscope at the Physics Department of the University of Northern Iowa (UNI). The combined system (Raman microscope and refrigeration system) will enable variable temperature optical microscopy studies of a variety of materials and will enhance and broaden the scope of the research at UNI. The acquisition of an optical microscopy refrigeration system will have a powerful impact on the undergraduate students at UNI. This equipment will be used in three undergraduate courses and will extend the reach of the instrument to approximately forty more students per year at UNI. It will also stimulate participation of greater numbers of students in research activities and provide undergraduate students with hands-on experience in low temperature optical experiments using world-class research instrumentation.