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.***

物理性能测量系统（PPMS）将用于研究高度相关和无序材料的性能。正在调查的问题包括超导体-绝缘体转变（SIT）在两个维度，金属-绝缘体的氧化物薄膜系统的转变，和超导波动的性质在欠掺杂的铜酸盐。将被研究的薄膜材料在当代凝聚态物理学中表现出重要的范例，如量子临界性和玻璃化。PPMS将补充我们实验室中用于超低温（低于1开尔文）和扫描隧道显微镜研究的一系列专用设施。它将用于确定将使用我们的专用设施进行研究的样品的质量。这方面的一个例子将是在静电调谐的SIT的工作，其中薄膜被纳入场效应晶体管配置使用机械减薄的单晶钛酸锶（STO）基板作为栅极绝缘体。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。PPMS将用于校准特定的基板，然后将其提交稀释冰箱实验。该仪器将有助于传统物理学博士研究生的培养。计划，以及为本科生和高中生提供机会，体验研究。物理性质测量系统（PPMS）将用于研究高度相关和无序材料的量子性质。研究中的问题包括二维超导体-绝缘体转变、氧化膜系统中的金属-绝缘体转变以及欠掺杂铜氧化物中超导涨落的性质。这些都是当代凝聚态物理中的重要问题。PPMS将补充我们实验室中用于超低温（低于1开尔文）和扫描隧道显微镜研究的一系列专用设施。它将提供一种手段，进行广泛的，电输运研究的薄膜在磁场高达9 T，温度范围从1.9K至400 K。这对于确定将使用我们的专用设施进行研究的样品的质量是必要的。该仪器将有助于传统物理学博士研究生的培养。项目，并为本科生和高中生提供体验实验研究的机会。*