Microscopic Structure and Dynamics of Charge Density Waves

电荷密度波的微观结构和动力学

• 批准号: 8715431
• 负责人: John Tucker
• 金额: $ 26.14万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-02-01 至 1991-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8715431&HistoricalAwards=false
• 关键词: Microscopic; Structure; Dynamics; Charge; Density

Charge density wave (CDW) motion in linear chain metals represents the only known example of electronic conduction by a moving quantum ground state, apart from superconductivity. They believe that this effect constitutes the most important unresolved problem in condensed matter physics. A large body of experimental evidence now supports the hypothesis that CDW acceleration in an electric field proceeds via macroscopic quantum tunneling, with phase coherence properities similar to the Josephson effect. Based upon years of previous work, they are proposing a program of combined experiment and theory which includes the following major element: (1) control of CDW pinning through ion bombardment and implantation, (2) direct observation of CDW structure and motion with their recently constructed scanning tunneling microscope, and (3) development of a complete theory for CDW motion. This program is designed to elucidate the microscopic aspects of this remarkable new phenomenon, and to simultaneously provide the control of CDW properties that will be required for future electronic application.

链状金属中的电荷密度波运动 代表了唯一已知的电子传导的例子， 移动量子基态，除了超导性。 他们 我认为这种影响是最重要的 凝聚态物理学中尚未解决的问题。 大量的 实验证据现在支持CDW的假设， 电场中的加速通过宏观进行 量子隧穿，具有类似于 约瑟夫森效应 根据多年来的工作，他们 提出了一个实验与理论相结合的方案， 包括以下主要内容：（1）控制CDW钉扎 通过离子轰击和注入，（2）直接观察 CDW的结构和运动， 扫描隧道显微镜，和（3）开发一个完整的 CDW运动理论 本程序旨在阐明 这一非凡的新现象的微观方面， 同时提供CDW性能的控制， 未来的电子应用。