Disorder and Correlation Effects Examined Through Electron Drag Measurements

通过电子阻力测量检查无序和相关效应

• 批准号: 9802109
• 负责人: Thomas Gramila
• 金额: $ 24万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-01 至 2000-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9802109&HistoricalAwards=false
• 关键词: Disorder; Correlation; Effects; Examined; Through

9802109 Gramila This condensed matter physics project investigates the influences of disorder and correlation effects on electron systems. The experiments depend on measurement of electron drag, which directly determines electron-electron scattering rates between closely spaced but electrically isolated two-dimensional (2D) gases. The experiments will investigate the influence of atomic disorder in the 2D planes on the electrical transport, and will probe exchange and correlation effects via determination of the spin polarization of 2D electrons subject to an in-plane magnetic field. The research is unique in providing direct measurements of parameters that can be directly compared with important theoretical predictions for the behavior of electrons in low- symmetry environments. The work will deepen our understanding of disorder and correlation effects that are of fundamental importance in the microelectronics and magnetism industries. The work provides a valuable arena for training graduate students in both advanced technology and fundamental physics. %%% This condensed matter physics project investigates the influences of disorder and correlation effects on electron systems. The experiments depend on measurement of electron drag, which directly determines electron-electron scattering rates between closely spaced but electrically isolated two-dimensional (2D) gases. The experiments will investigate the influence of atomic disorder in the 2D planes on the electrical transport, and will probe exchange and correlation effects via determination of the spin polarization of 2D electron subject to an in-plane magnetic field. The research is unique in providing direct measurements of parameters that can be directly compared with important theoretical predictions for the behavior of electrons in low- symmetry environments. The work will deepen our understanding of disorder and correlation effects that are of fundamental importance in the microelectronics a nd magnetism industries. The work provides a valuable arena for training graduate students in both advanced technology and fundamental physics. ***

[802109] Gramila这个凝聚态物理项目研究了无序和相关效应对电子系统的影响。实验依赖于电子阻力的测量，它直接决定了电子-电子在紧密间隔但电隔离的二维（2D）气体之间的散射率。实验将研究二维平面上原子无序对电输运的影响，并通过测定平面内磁场作用下二维电子的自旋极化来探测交换和相关效应。这项研究的独特之处在于提供了参数的直接测量，可以直接与低对称性环境中电子行为的重要理论预测进行比较。这项工作将加深我们对微电子和磁性工业中至关重要的无序和相关效应的理解。这项工作为培养高级技术和基础物理方面的研究生提供了一个有价值的舞台。这个凝聚态物理项目研究无序和相关效应对电子系统的影响。实验依赖于电子阻力的测量，它直接决定了电子-电子在紧密间隔但电隔离的二维（2D）气体之间的散射率。实验将研究二维平面上原子无序对电输运的影响，并通过测定平面内磁场作用下二维电子的自旋极化来探测交换和相关效应。这项研究的独特之处在于提供了参数的直接测量，可以直接与低对称性环境中电子行为的重要理论预测进行比较。这项工作将加深我们对微电子和磁性工业中至关重要的无序和相关效应的理解。这项工作为培养高级技术和基础物理方面的研究生提供了一个有价值的舞台。＊＊＊