IMR: Acquisition of a Measurement System for Research and Education in Thin Film Materials

IMR：购买用于薄膜材料研究和教育的测量系统

• 批准号: 0414890
• 负责人: Allen Goldman
• 金额: $ 10.63万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-09-01 至 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0414890&HistoricalAwards=false
• 关键词: IMR; Acquisition; Measurement; System; Research

A Physical Properties Measurement System (PPMS) will be used to investigate the properties of highly correlated and disordered materials. Problems under investigation include the superconductor-insulator transition (SIT) in two dimensions, metal-insulator transitions in oxide film systems, and the nature of superconducting fluctuations in underdoped cuprates. The thin film materials that would be investigated exhibit important paradigms in contemporary condensed matter physics such as quantum criticality and glassiness. The PPMS would complement a series of dedicated facilities in our laboratory used for ultra-low temperature (below 1 Kelvin) and scanning tunneling microscope studies. It would be used to establish the quality of the samples that would be studied using our dedicated facilities. An example of this would be in work on electrostatic tuning of the SIT in which films are incorporated in a field effect transistor configuration using a mechanically thinned single-crystal strontium titanate (STO) substrate as a gate insulator. The dielectric constant of STO at low temperatures depends upon the electric field, thus the charge transfer is a nonlinear function of gate voltage. The PPMS would be used to calibrate specific substrates before committing them to dilution refrigerator experiments. The instrument will contribute to the training of graduate students in a traditional physics Ph.D. program as well as provide opportunities for undergraduates and high school students to experience research. %%%A Physical Properties Measurement System (PPMS) will be used to investigate the quantum properties of highly correlated and disordered materials. Problems under investigation include the superconductor-insulator transition in two dimensions, metal-insulator transitions in oxide film systems, and the nature of superconducting fluctuations in underdoped cuprates. These are important problems in contemporary condensed matter physics. The PPMS would complement a series of dedicated facilities in our laboratory used for ultra-low temperature (below 1 Kelvin) and scanning tunneling microscope studies. It would provide a means of carrying out extensive, electrical transport studies of thin films in magnetic fields of up to 9T, over a temperature range from 1.9K to 400K. These are necessary to establish the quality of the samples that would be studied using our dedicated facilities. The instrument will contribute to the training of graduate students in a traditional physics Ph.D. program as well as provide opportunities for undergraduates and high school students to experience experimental research.***

物理特性测量系统（PPM）将用于研究高度相关和无序材料的性质。正在研究的问题包括二维的超导体 - 绝缘体过渡（SIT），氧化物膜系统中的金属 - 绝缘体跃迁以及不足的铜层中超导波动的性质。将要研究的薄膜材料在当代冷凝物理学（例如量子临界和玻璃度）中表现出重要的范式。 PPM将补充我们用于超低温度（低于1 Kelvin）和扫描隧道显微镜研究的实验室中的一系列专用设施。它将用于建立使用我们专用设施研究的样品的质量。一个例子就是在使用机械薄的单晶层钛酸盐（STO）底物作为栅极绝缘体中，将膜的静电调节作用。 STO在低温下的介电常数取决于电场，因此电荷转移是栅极电压的非线性函数。 PPM将用于校准特定的底物，然后将其提交稀释冰箱实验。该乐器将在传统物理博士学位上培训研究生。计划以及为大学生和高中生提供研究的机会。 %% %%物理特性测量系统（PPM）将用于研究高度相关和无序材料的量子性质。正在研究的问题包括在二维中的超导体 - 绝缘体转变，氧化物膜系统中的金属 - 绝缘体跃迁以及不足的库酸酯中超导波动的性质。这些是当代冷凝物理物理学中的重要问题。 PPM将补充我们用于超低温度（低于1 Kelvin）和扫描隧道显微镜研究的实验室中的一系列专用设施。它将提供一种在温度从1.9k到400K的范围内对磁场中的薄膜进行广泛的电气传输研究的方法。这些对于建立使用我们专用设施进行研究的样品的质量是必不可少的。该乐器将在传统物理博士学位上培训研究生。计划以及为大学生和高中生提供实验研究的机会。***