Quantum Transport and Related Phenomena in Quasi-2D Systems

准二维系统中的量子输运及相关现象

• 批准号: 0077266
• 负责人: Alexander Meyerovich
• 金额: $ 22.2万
• 依托单位: University of Rhode Island
• 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: 2000-07-15 至 2005-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0077266&HistoricalAwards=false
• 关键词: Quantum; Transport; Related; Phenomena; Quasi

0077266MeyerovichThis grant continues to support the work of this midcareer PI on quantum anomalies in transport, dissipation and related phenomena in ultra-thin micro and nanoscale systems with special emphasis on quantum size effect conditions. The linkage between different projects on properties of various quasi-2d physical systems is a study of the effects of surface roughness. This is based on a novel formalism developed by the PI. Different projects include: (1) Transport and dissipation in ultra-thin systems with quantum size effect, (2) accommodation on rough surfaces and slip length, (3) Surface roughness and friction in quantized systems, (4) time dependent roughness and finally ( 5) periodically modulated walls with or without random roughness.%%%In a film so thin that the size effects are quantum mechanical, there are a variety of possible novel effects related to disorder. For example, the external surfaces may be rough and lead to additional resistance to the motion of electrons in a metal. The grant here continues to support the work of this midcareer PI, who has developed a novel formalism to study precisely these effects. The effects appear in transport phenomena, e.g. flow impedance or electrical resistance of nanoscale thin metallic films. They might appear in properties of friction or accommodation (sticking of fast moving particles near a surface). Finally there are conditions where the surface may be periodically moving or it might have roughness which varies in time. These ideas have application in a wide variety of areas, ranging from properties of ultra-thin films to flow of classical gases past rough walls, and to propagation of waves past rough walls.***

0077266Meyerovich这笔赠款继续支持这个职业生涯中期PI在超薄微纳米系统中传输，耗散和相关现象的量子异常的工作，特别强调量子尺寸效应条件。 各种准二维物理系统的性质的不同项目之间的联系是表面粗糙度的影响的研究。 这是基于PI开发的一种新的形式主义。 不同的项目包括：（1）具有量子尺寸效应的超薄系统中的输运和耗散，（2）粗糙表面上的容纳和滑移长度，（3）量子化系统中的表面粗糙度和摩擦，（4）随时间变化的粗糙度，最后（5）具有或不具有随机粗糙度的周期性调制壁。在如此薄的薄膜中，尺寸效应是量子力学的，有各种可能的与无序有关的新效应。 例如，外表面可能是粗糙的，并导致对金属中电子运动的额外阻力。 这里的补助金继续支持这个职业生涯中期的PI的工作，他已经开发了一种新的形式主义来精确地研究这些影响。 这种效应出现在输运现象中，例如纳米金属薄膜的流动阻抗或电阻。 它们可能出现在摩擦或调节的性质中（快速移动的粒子在表面附近的粘附）。 最后，在某些情况下，表面可能会周期性地移动，或者它可能具有随时间变化的粗糙度。 这些想法在各种各样的领域都有应用，从超薄膜的性质到经典气体通过粗糙壁的流动，以及波通过粗糙壁的传播。