Impurity Pinning and Finite Size Effects in Sliding Charge- Density-Wave Systems

滑动电荷密度波系统中的杂质钉扎和有限尺寸效应

• 批准号: 8918618
• 负责人: Robert Thorne
• 金额: $ 7万
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-05-15 至 1992-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8918618&HistoricalAwards=false
• 关键词: Impurity; Pinning; Finite; Size; Effects

Quasi-one-dimensional conductors such as niobium triselenide exhibit striking transport properties resulting from the collective motion of charge-density waves (CDWs). A detailed understanding of these phenomena has been difficult because of the many factors, including pinning by impurities and other defects, surface pinning, finite size effects, and contacts which may affect the behavior. This work will study niobium triselenide doped with hydrogen impurities which very weakly interact with the CDWs and permit study of the weakly pinned regime. Both the nature of CDW-surface interactions and finite size effects will also be studied. This program will be supported by a strong materials effort involving the characterization of defects and the development of improved crystal growth methods.

准一维导体，如三硒化铌 表现出惊人的传输性能， 电荷密度波（CDW）的集体运动。 详细 对这些现象的理解是困难的，因为 许多因素，包括杂质和其他 缺陷、表面钉扎、有限尺寸效应和接触， 可能会影响行为。 这项工作将研究铌 掺杂有氢杂质的三硒化物， 与CDW相互作用，并允许研究弱钉扎 政权 CDW与表面相互作用的性质和有限性 还将研究规模效应。 该计划将 在强大的物质努力的支持下， 缺陷的表征和改进的 晶体生长方法