Formation of High Temperature Superconducting Balls

高温超导球的形成

• 批准号: 0075780
• 负责人: Rongjia Tao
• 金额: $ 27万
• 依托单位: Temple University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-11-01 至 2005-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0075780&HistoricalAwards=false
• 关键词: Formation; Temperature; Superconducting; Balls

This individual investigator award is for a project to investigate a newly discovered phenomenon, superconducting granular balls. When a strong electric field is applied to a suspension of liquid nitrogen and high temperature superconducting particles, the granular particles quickly move between the electrodes and bind themselves together to form macroscopic balls in milliseconds. The phenomenon shows a new property of superconductor: electric field induced surface energy. The current preliminary explanation relates this surface energy to a loss of Joshphson coupling energy between the ab-planes due to the induced surface charge on the particles. The physical model requires extensive development. The new phenomenon is also related to a long-standing unresolved issue: the behavior of superconductors in a static electric field. The basic science of the phenomenon is important to the understanding and development of superconductivity. The research may also lead to a new method to produce superconducting films. The project offers excellent opportunity for the training of undergraduate students, graduate students, and postdoctoral fellows in techniques that will prepare them for future careers. %%%This individual investigator award is for a project directed towards the study of a new phenomenon of superconductivity discovered recently, the formation of superconducting granular balls in a strong electric field. The current theoretical explanation concludes that the nature of the phenomenon is a new property of superconductivity. The discovery is also related to a long-standing unresolved important issue: the behavior of superconductors in a static electric field. The basic science of the phenomenon is important to the understanding and development of superconductivity. The research may also lead to a new method to produce superconducting films. The project involves undergraduate students, graduate students, and postdoctoral fellow, whose training in a forefront of physics prepares them for the future career in science. ***

这一个人研究人员奖是为了研究一种新发现的现象--超导颗粒球--的项目。当对液氮和高温超导粒子的悬浮液施加强大的电场时，颗粒粒子在电极之间快速移动并将自己结合在一起，在几毫秒内形成宏观球。这一现象显示了超导体的一种新性质：电场诱导表面能。目前的初步解释将这种表面能与由于粒子上的感生表面电荷而导致的ab面间Joshphson耦合能的损失有关。物理模型需要广泛的发展。这一新现象还与一个长期悬而未决的问题有关：超导体在静电场中的行为。这一现象的基础科学对于理解和发展超导电性很重要。这项研究还可能带来一种生产超导薄膜的新方法。该项目为本科生、研究生和博士后研究员提供了极好的培训机会，使他们能够为未来的职业生涯做好准备。这个个人研究人员奖是为了研究最近发现的一种新的超导现象--在强电场中形成超导颗粒球--而颁发的。目前的理论解释认为，这一现象的本质是超导的一种新性质。这一发现还与一个长期悬而未决的重要问题有关：超导体在静电场中的行为。这一现象的基础科学对于理解和发展超导电性很重要。这项研究还可能带来一种生产超导薄膜的新方法。该项目涉及本科生、研究生和博士后研究员，他们在物理学前沿的培训为他们未来的科学生涯做好了准备。***