CAREER: Mesoscopic Physics of Disordered Superconductors: An Arena for Research and Education

职业：无序超导体的介观物理：研究和教育的舞台

• 批准号: 9702661
• 负责人: Ying Liu
• 金额: $ 30万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-07-15 至 2002-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9702661&HistoricalAwards=false
• 关键词: CAREER; Mesoscopic; Physics; Disordered; Superconductors

9702661 Liu This experimental CAREER grant project focuses on the effects of disorder on meso-scale superconductors. A central research goal is to determine experimentally whether a negative local superfluid density exists. The experiments will make use of e-beam lithography and ultrathin film fabrication techniques and a well equipped low temperature measurement laboratory. Some specific aims are measurement of magnetoresistance and electric field effect in single and arrays of mesoscopic superconducting bismuth rings; measurement of mesoscopic fluctuations in magnetic fields in Auln alloy and Bi samples. The completion of these experiments will have a strong bearing on the question of the negative superfluid density. The proposed research will be integrated into an education plan to help enhance student learning and to train future scientists. The education plan is designed in part to promote women's participation in science, which will be beneficial for science and its well being as a profession. the fundamental knowledge which will be gained in this work will deepen our understanding of the fundamental nature of Cooper pairing correlation in disordered superconductors and may have significant impacts on several related fields. The behavior of mesoscopic scale superconductors is also relevant in potential applications including sensitive sensors of electromagnetic radiation and high performance low dissipation logic circuits. %%% This experimental CAREER grant project probes the fundamental changes in the phenomenon of superconductivity as the samples become very small or very thin, and as the superconducting material itself becomes disordered. The questions being studied are made more important and interesting by the essentially quantum mechanical nature of superconductivity. A focus of the work is to search for a particular theoretically possible eff ect, called a negative superfluid density. The existence of such as effect, if proven by work such as is proposed, would have implications for related areas of science. The long term outcome of such research could include the development of improved electronic devices for detecting electromagnetic radiation and/or for making rapid calculations. The education plan included in this project integrates research and education and aims to promote women's participation in science. ***

9702661 Liu 这个实验性的职业资助项目重点研究无序对中尺度超导体的影响。 一个中心研究目标是通过实验确定负局部超流体密度是否存在。 实验将利用电子束光刻和超薄膜制造技术以及设备齐全的低温测量实验室。 一些具体目标是测量单个介观超导铋环和阵列中的磁阻和电场效应； 测量 Auln 合金和 Bi 样品中磁场的细观波动。 这些实验的完成将对负超流体密度问题产生重大影响。 拟议的研究将纳入教育计划，以帮助加强学生的学习并培训未来的科学家。 该教育计划的部分目的是促进妇女参与科学，这将有利于科学及其作为一个职业的福祉。 这项工作中获得的基础知识将加深我们对无序超导体库珀配对相关性基本性质的理解，并可能对几个相关领域产生重大影响。 介观尺度超导体的行为也与潜在的应用相关，包括电磁辐射敏感传感器和高性能低耗散逻辑电路。 %%% 这个实验性的职业资助项目探讨了当样品变得非常小或非常薄以及超导材料本身变得无序时超导现象的根本变化。 超导本质上的量子力学性质使得正在研究的问题变得更加重要和有趣。 这项工作的重点是寻找一种特定的理论上可能的效应，称为负超流体密度。 如果通过所提出的工作证明这种效应的存在，将对相关科学领域产生影响。 此类研究的长期成果可能包括开发用于检测电磁辐射和/或进行快速计算的改进电子设备。 该项目包含的教育计划将研究和教育融为一体，旨在促进妇女参与科学。 ***