CAREER: Time-Resolved Studies of Correlated Electronic Materials

宾夕法尼亚大学的这个学院早期职业发展(CALEAR)项目将使用最先进的超快光学实验来研究强相互作用(相关)电子系统中与载流子密度相关的磁不稳定性。短脉冲(100ps)激光将调制巨磁阻氧化物和弱铁磁性二价硼氧化物中的载流子浓度，从而扰乱它们的复杂多体状态。各种时间分辨光学技术将被用来获得随之而来的磁、电荷和晶格动力学的多维图像。如果成功，所获得的洞察力可能有助于指导相关材料在涉及磁阻和铁磁有序的光学控制的技术应用中的发现。该项目的教育部分将原型和部署基于互联网的引人入胜和娱乐性的实验，向高中生介绍科学发现的过程。到达网站的学生将有机会远程控制设备并进行实验。实验设计方面的考虑将得到相当大的重视，包括教育价值、可扩展性、与课程内容的整合以及目标年龄段。最近发现了新的和不太了解的磁铁，宾夕法尼亚大学的这项教师早期职业发展(CALEAR)项目旨在澄清他们使用短激光脉冲的行为。这些磁铁的不同寻常的特性创造了这样一种可能性，即通过适当的材料设计，光可以用来控制它们的磁场强度和南北磁极的位置。另一个潜在的用途是磁记录，相关材料可以作为计算机硬盘驱动器的传感器。该项目旨在通过捕捉各种材料对短暂激光激发的反应，为这类工作提供知识基础。该项目的教育部分将原型和部署基于互联网的引人入胜和娱乐性的实验，向高中生介绍科学发现的过程。到达网站的学生将有机会远程控制设备并进行实验。实验设计方面的考虑将得到相当大的重视，包括教育价值、可扩展性、与课程内容的整合以及目标年龄段。***

This Faculty Early Career Development (CAREER) project at the University of Pennsylvania will study magnetic instabilities related to the carrier density in strongly interacting (correlated) electronic systems using state-of-the art ultrafast optical experiments. Short (100 fs) laser pulses will modulate the carrier concentration in colossally magnetoresistive oxides and weakly ferromagnetic divalent hexaborides, thereby perturbing their complex many-body states. A variety of time-resolved optical techniques will be utilized to obtain a multi-dimensional view of the ensuing magnetic, charge and lattice dynamics. If successful, the insight obtained may help guide the discovery of related materials of use in technological applications involving magnetoresistance and the optical control of ferromagnetic order. The educational component of this project will prototype and deploy captivating and entertaining internet-based experiments that introduce high school students to the process of scientific discovery. Students arriving at a web site will be given the opportunity to remotely grab the controls of an apparatus and to experiment with them. Considerable attention will be paid to experimental design considerations, including educational value, scalability, integration with course content, and target age groups. %%%New and poorly understood magnets have been discovered recently, and this Faculty Early Career Development (CAREER) project at the University of Pennsylvania aims to clarify their behavior using short laser pulses. The unusual properties of these magnets create the possibility that, with proper materials design, light could be used to control their magnetic strength and the positions of their north and south magnetic poles. Another potential use is in magnetic recording, where related materials could serve as sensors in computer hard disk drives. This project aims to provide a foundation of knowledge for such efforts by capturing a variety of material responses to brief laser excitation. The educational component of this project will prototype and deploy captivating and entertaining internet-based experiments that introduce high school students to the process of scientific discovery. Students arriving at a web site will be given the opportunity to remotely grab the controls of an apparatus and to experiment with them. Considerable attention will be paid to experimental design considerations, including educational value, scalability, integration with course content, and target age groups. ***