CAREER: Quantum Critical Dynamics in Magnetic Systems

这项授予明尼苏达大学一名年轻教职员工的职业奖项将建立一个研究计划，研究量子临界点附近磁系统的自旋动力学。该项目将开发和实施一种混合磁光技术，用于探测磁相变附近的实时自旋动力学。将探索10-1000皮秒量级的时间尺度上的松弛，提供关于自旋动力学的信息，以补充传统的技术，如中子散射。该项目是跨学科的，借鉴了磁学和半导体物理学的想法。与这项研究相结合的是一项加强跨学科方法的教育计划，例如在这项工作中使用的方法，将在明尼苏达大学建立一个新的科学交流方案，作为高级实验方法课程的一部分。将开发一套改善书面和口头交流的资源，允许物理学生从他们的导师、同龄人和大学在线写作中心的教学支持人员那里获得反馈。这个授予明尼苏达大学一名年轻教职员工的职业奖项将建立一个研究项目，研究磁性材料中非常快的过程。这样的过程用于对计算机硬盘读取和写入信息。将开发一种新的探测器，它将能够检查在时间尺度上发生的过程，速度最高可达台式PC微处理器500 MHz操作速度的200倍。该项目将采用一种脉冲激光技术，该技术改编自半导体实验。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之间以及与普通公众的交流方式。明尼苏达大学的物理专业课程将采用新的书面和口头交流教学技术。将为教师和同行的反馈制定一个新的框架，最终目标是将这些技术转移到更大的入门实验室课程论坛。

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.