CAREER: Heat Capacity Study on Low Dimensional Electronic Systems at Low Temperature

职业：低温低维电子系统热容研究

• 批准号: 0239450
• 负责人: Jongsoo Yoon
• 金额: $ 45万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-03-01 至 2009-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0239450&HistoricalAwards=false
• 关键词: CAREER; Heat; Capacity; Study; Low

This CAREER project addresses simultaneous heat capacity and transport measurements on Kosterlitz-Thouless (KT) type superconducting transitions and Superconductor-Insulator Transi-tions (SIT) at temperatures down to ~10mK. The project includes design and fabrication of a state-of-the-art low temperature nano-calorimeter. With a SQUID readout, the expected sensitiv-ity of the calorimeter is expected to be sufficient to detect the electronic heat capacity contribu-tion from a metal (copper, for example) of ~1 nanogram at 10mK, corresponding to a monolayer film covering an area of ~1mm in diameter. Superconducting transitions of ultrathin AuIn, Ta, and Bi films will be investigated in a continuous flow He cryostat, and a dilution refrigerator. Experimental techniques to be developed are expected to also impact the study of thermody-namic properties of other 2D systems such as Fermi liquids, Kondo systems, and electrons in semiconductor interfaces, providing a foundation for a lifetime of contribution and education in this field. The project involves education and training of undergraduate and graduate students in industry-standard microfabrication techniques and a variety of condensed matter techniques. Computer-based acquisition and analysis of large data sets requires training at the frontier of information technology. These opportunities will help students develop future-oriented perspectives on sci-ence and technology. The PI will develop a new course to teach principles and applications of various state-of-the-art devices to science majors and graduate students from various disciplines of science. The course will offer students active participation in the class activity in the form of case study, literature search, and poster presentations. An outreach effort includes creating a comprehensive website containing educational materials related with research and educational activities, K12 and community college lectures, demonstration, and laboratory tours. ***

该职业项目介绍了Kosterlitz-Thouless（KT）型超导过渡和超导体 - 导管转移器（SIT）的同时进行热容量和运输测量值（SIT）。该项目包括设计和制造最先进的低温纳米水平计。通过鱿鱼读数，预期量热计的预期灵敏度足以检测到10MK时金属（例如铜）的电子热容量（例如铜（例如，铜）的含量约为1纳米图，对应于覆盖直径约1mm的单层膜。超然Auin，TA和BI膜的超导过渡将以连续的冷冻仪和稀释冰箱进行研究。预计要开发的实验技术还会影响半导体界面中其他2D系统（例如费米液体，近藤系统和电子）的热力学特性的研究，从而为该领域的贡献和教育提供了基础。该项目涉及在行业标准的微加工技术和各种凝结物质技术方面的本科和研究生的教育和培训。基于计算机的获取和大型数据集的分析需要在信息技术的前沿进行培训。这些机会将有助于学生发展有关科学和技术的未来观点。 PI将开发一门新课程，以向科学专业的各种科学专业和研究生教授各种科学学科的研究生的原则和应用。该课程将以案例研究，文献搜索和海报演示的形式为学生积极参与班级活动。推广工作包括创建一个综合网站，其中包含与研究和教育活动，K12和社区学院讲座，演示和实验室旅行有关的教育材料。 ***