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

1337207技术摘要：这项重大研究仪器奖支持北爱荷华大学（UNI）获得一个封闭循环光学显微镜低温恒温器，该低温恒温器将与Horiba Labram HR拉曼显微镜相连接。该组合系统将使材料的可变温度光学显微镜研究成为可能，如二维二硫化物系统和低维拓扑绝缘体（TIs）。该仪器将能够研究一系列当前凝聚态物质的主题，如电荷密度波和超导之间的相互作用，纳米结构中电荷和声子的量子限制效应的物理学，低维TI的表面性质的研究，以及TI纳米结构表面狄拉克锥的光学特征的研究。该仪器还将被整合到本科生的研究中，并将被纳入UNI的三门本科课程中。最先进的光学显微镜低温恒温器将大大拓宽UNI的研究和教学范围。摘要：该主要研究仪器奖支持获得一种高效制冷系统，用于不同材料的变温光学显微镜研究。该系统将与北爱荷华大学物理系的商用拉曼显微镜结合使用。联合系统（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UNI的研究范围。购置光学显微镜制冷系统将对大学本科生产生重大影响。该设备将用于三门本科课程，并将扩大仪器的覆盖范围，每年约有40多名学生在UNI。它还将激发更多学生参与研究活动，并为本科生提供使用世界一流研究仪器进行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.