CAREER: Theory of the Conducting--Insulating Transition Region

职业：传导-绝缘转变区理论

• 批准号: 9985255
• 负责人: Leon Balents
• 金额: $ 20万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-01-15 至 2004-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9985255&HistoricalAwards=false
• 关键词: CAREER; Theory; Conducting; Insulating; Transition

This CAREER grant supports the integration of research and education in the career plan of this young theoretical physicist and faculty member at the University of California, Santa Barbara. The research plan includes four problems. The first deals with a description of a metal-insulator transition in a 2-dimensional electron gas in terms of a dual Ginzburg-Landau theory. The second concerns the properties of recently discovered itinerant ferromagnetism in lightly doped hexaborides. A third concerns a study of possibly inhomogeneous states preceding the transition, and finally a fourth project deals with the properties of linear and nonlinear transport in a one-dimensional object, such as a carbon nanotube. For education, the PI plans to supervise students, teach courses and be a mentor. In addition, he is planning a special seminar series on quantum condensed matter physics, involving the department of physics (where the students are) and the Institute for Theoretical Physics, with its relatively large membership of postdoctoral fellows. Finally he plans to conduct another seminar about career options for undergraduate and graduate students.%%%This CAREER award supports the research and education plans of this young, theorist member of the physics department at the University of California, Santa Barbara. The research interest consists of four projects, all related to the properties of electrons in insulators which are on the threshold of becoming metallic conductors. The first project is the most general one and involves a search for a theoretical, unified description of a metal-insulator phase transition. The second project concerns the properties of the remarkable ferromagnetic phase when calcium hexaboride, an insulator, is very lightly doped with lanthanum to make it slightly conducting. The third project studies possible pathways to the change between an insulator and a conductor and how each is reflected in the linear and nonlinear transport properties. Finally the fourth project is an extensive study of the remarkable conducting properties of nanowires, for example the carbon nanotubes. In education, there are plans to teach courses, supervise graduate students and mentor postdoctoral fellows. In addition there are plans to conduct seminars on career options for undergraduates; an exploration of alternative applications of physics education.***

这项职业补助金支持这位加州大学圣巴巴拉分校的年轻理论物理学家和教职员工在职业规划中整合研究和教育。研究计划包括四个问题。第一部分用双金兹堡-朗道理论描述了二维电子气体中的金属-绝缘体跃迁。第二个是关于最近发现的轻掺杂六硼化物的流动铁磁性的性质。第三个项目涉及过渡前可能的非均匀状态的研究，最后一个项目涉及一维物体（如碳纳米管）中线性和非线性输运的性质。在教育方面，PI计划监督学生，教授课程并担任导师。此外，他正在计划一个关于量子凝聚态物理的特别系列研讨会，涉及物理系（学生所在的地方）和理论物理研究所，该研究所拥有相对较多的博士后研究员。最后，他计划为本科生和研究生举办另一场关于职业选择的研讨会。这个职业奖支持这位加州大学圣巴巴拉分校物理系的年轻理论家的研究和教育计划。研究兴趣包括四个项目，都与即将成为金属导体的绝缘体中的电子性质有关。第一个项目是最一般的一个，涉及寻找金属-绝缘体相变的理论统一描述。第二个项目关注的是当六硼化钙（一种绝缘体）非常轻地掺杂镧以使其具有微导电性时，其显著的铁磁相的特性。第三个项目研究绝缘体和导体之间变化的可能途径，以及每种途径如何反映在线性和非线性输运性质中。最后，第四个项目是对纳米线（例如碳纳米管）卓越导电性能的广泛研究。在教育方面，计划教授课程，指导研究生和指导博士后。此外，还计划为本科生举办关于职业选择的研讨会；物理教育的另类应用探索***