Impurities and defects in condensed matter systems

凝聚态系统中的杂质和缺陷

• 批准号: 250045-2007
• 负责人: Chow, Kim
• 金额: $ 3.91万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=479456
• 关键词: Impurities; defects; condensed; matter; systems

Impurities and defects in condensed matter systems are interesting and important. In addition to the fascinating fundamental physics phenomena associated with these centers, the behavior of only a minute amount of impurities/defects inside many such materials (especially semiconductors) determines their eventual usefulness in practical applications since they dramatically modify the optical and/or electrical properties of the host. One of my primary research activities is the elucidation of the local structure, diffusitivities, interactions, and reactions of isolated impurities in bulk and nano-scale semiconductors, insulators, and metals. Furthermore, some of these impurities, which I intentionally introduce into the materials, can be used as microscopic probes of the magnetism in the material where they reside. In fact, another of my research activities is the investigation of several types of interesting magnetic systems and the study of near surface structural phase transitions. Moreover, I also study the technological implications of defect-induced phenomena in correlated electronic systems such as colossal magnetoresistance materials and high temperature superconductors.

凝聚态物质系统中的杂质和缺陷是有趣且重要的。除了与这些中心相关的令人着迷的基本物理现象之外，许多此类材料（尤其是半导体）内部仅微量的杂质/缺陷的行为决定了它们在实际应用中的最终用途，因为它们极大地改变了主体的光学和/或电学特性。我的主要研究活动之一是阐明块状和纳米级半导体、绝缘体和金属中孤立杂质的局部结构、扩散性、相互作用和反应。 此外，我有意将其中一些杂质引入到材料中，可以用作它们所在材料中磁性的显微探针。 事实上，我的另一项研究活动是研究几种有趣的磁系统和近表面结构相变的研究。此外，我还研究相关电子系统（例如巨磁阻材料和高温超导体）中缺陷引起的现象的技术含义。