CAREER: Quantum Critical Dynamics in Magnetic Systems

职业：磁系统中的量子临界动力学

• 批准号: 9983777
• 负责人: Paul Crowell
• 金额: $ 34万
• 依托单位: University of Minnesota-Twin Cities
• 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: 2000-02-01 至 2004-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9983777&HistoricalAwards=false
• 关键词: CAREER; Quantum; Critical; Dynamics; Magnetic

This CAREER award to a young faculty member at the University of Minnesota will establish a research program to study the spin dynamics of magnetic systems near quantum critical points. This project will develop and implement a hybrid magneto-optical technique for probing real-time spin dynamics near magnetic phase transitions. Relaxation on time scales of order 10 - 1000 picoseconds will be probed, providing information about spin dynamics that complements traditional techniques such as neutron scattering. The project is interdisciplinary, drawing on ideas from magnetism and semiconductor physics. Integrated with this research is an educational plan to enhance interdisciplinary approaches such as that used in this work, a new program in scientific communication will be established as part of an upper-level experimental methods course at the University of Minnesota. A set of resources for improving both written and oral communication will be developed, allowing physics students to receive feedback from their instructors, peers, and teaching support personnel in the University's Online Writing Center.This CAREER award to a young faculty member at the University of Minnesota will establish a research program to study very fast processes in magnetic materials. Such processes are used for reading and writing information to computer hard disks. A new probe will be developed that will be capable of examining processes that occur on time scales up to 200 times faster than the 500 MHz operating speed of a desktop PC microprocessor. The project will employ a pulsed laser technique that is adapted from experiments on semiconductors. This is an example of how scientists benefit from communication across different disciplines. The educational plan of this project is to improve the way that scientists communicate with each other as well as with the general public. New techniques for teaching written and oral communication will be implemented in physics major courses at the University of Minnesota. A new framework for feedback from instructors and peers will be developed with the ultimate goal of transferring these techniques to the larger forum of introductory laboratory courses.

这个职业奖给明尼苏达大学的一名年轻教师，将建立一个研究计划，研究量子临界点附近磁性系统的自旋动力学。 本计画将发展并实作一种混合磁光技术，以即时侦测磁性相变附近的自旋动力学。 将探测10 - 1000皮秒量级的时间尺度上的弛豫，提供有关自旋动力学的信息，以补充中子散射等传统技术。 该项目是跨学科的，借鉴了磁学和半导体物理学的思想。 与这项研究相结合的是一项教育计划，以加强跨学科的方法，如在这项工作中使用的，一个新的计划，在科学传播将建立一个上层实验方法课程的一部分，在明尼苏达大学。 将开发一套用于提高书面和口头交流的资源，使物理学生能够从大学在线写作中心的导师、同行和教学支持人员那里获得反馈。明尼苏达大学的一名年轻教师将获得这项职业奖，该奖项将建立一个研究计划，研究磁性材料中的超快速过程。 这些进程用于阅读和写入计算机硬盘信息。 将开发一种新的探测器，能够检查在时间尺度上发生的过程，其速度比台式PC微处理器的500 MHz操作速度快200倍。 该项目将采用脉冲激光技术，该技术是从半导体实验中改编而来的。 这是科学家如何从不同学科的交流中受益的一个例子。 该项目的教育计划是改善科学家相互交流以及与公众交流的方式。 明尼苏达大学将在物理专业课程中实施书面和口头交流教学的新技术。 一个新的框架，从教师和同行的反馈意见将开发与转移这些技术的最终目标，以更大的论坛介绍实验室课程。