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Conductor-Insulator Transitions in Strongly Correlated Systems

强相关系统中的导体-绝缘体转变

基本信息

批准号：
1307075
负责人：
Dragana Popovic
金额：
$ 39万
依托单位：
Florida State University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2013
资助国家：
美国
起止时间：
2013-07-01 至 2017-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1307075&HistoricalAwards=false
关键词：
Conductor Insulator Transitions Strongly Correlated

项目摘要

****Technical Abstract****One of the central issues in condensed matter physics is understanding the nature of the ground states in strongly correlated materials, the transitions between those states, and the associated dynamics. This project will seek to answer those questions by conducting a series of linear, non-linear and time-resolved transport measurements on two model experimental systems: two-dimensional electron system in semiconductor heterostructures and underdoped copper oxides. The knowledge gained from those studies will be essential to the development of condensed matter subfields of strongly correlated materials and out-of-equilibrium phenomena. This project will support the education and training of graduate and undergraduate students, who will acquire valuable technical and analytical skills for a wide range of careers in the areas of science and technology in academic, industrial or government settings. The PI and graduate students will also engage in a variety of outreach activities, such as the Annual Open House at the National High Magnetic Field Laboratory.****Non-Technical Abstract****In many novel materials with potentially great technological importance, such as high-temperature superconductors, the state that conducts electricity (a "conductor") is created by chemically doping an otherwise insulating material. Such materials, therefore, find themselves close to the conductor-insulator transition. Understanding the nature of this transition thus represents an important issue for materials science and technology. It also presents a fundamental problem in condensed matter physics. This project will address the problem of complex behavior near the conductor-insulator transition by performing electrical transport measurements on semiconductor devices and high temperature superconductor materials. The results anticipated from these experiments are expected to provide fundamental insights into these problems, and may be of relevance for future applications. The project will give graduate and undergraduate students an excellent preparation for careers in academia, industry, and government.

****技术摘要****凝聚态物理学的核心问题之一是理解强相关材料中基态的性质，这些状态之间的转换以及相关的动力学。本项目将通过对两个模型实验系统（半导体异质结构中的二维电子系统和欠掺杂铜氧化物）进行一系列线性、非线性和时间分辨输运测量来寻求这些问题的答案。从这些研究中获得的知识将对发展强相关材料和非平衡现象的凝聚态子场至关重要。该项目将支持研究生和本科生的教育和培训，他们将获得宝贵的技术和分析技能，以便在学术、工业或政府环境中从事科学和技术领域的广泛职业。PI和研究生还将参与各种外展活动，例如国家高磁场实验室的年度开放日。****非技术摘要****在许多具有潜在重大技术重要性的新材料中，例如高温超导体，通过化学掺杂其他绝缘材料来产生导电状态（“导体”）。因此，这些材料发现自己接近导体-绝缘体的转变。因此，理解这种转变的本质是材料科学和技术的一个重要问题。它还提出了凝聚态物理中的一个基本问题。该项目将通过对半导体器件和高温超导体材料进行电输运测量来解决导体-绝缘体过渡附近的复杂行为问题。这些实验的预期结果有望为这些问题提供基本的见解，并可能与未来的应用相关。该项目将为研究生和本科生在学术界、工业界和政府的职业生涯做好准备。