Infrared Hall Effect in High Temperature Superconductors

这项由马里兰大学一位知名教授完成的项目包括对强关联过渡金属氧化物金属的红外(IR)和微波磁光研究，重点是铜酸盐高温超导体。利用最近发展起来的高灵敏度偏振调制技术来探测微小的磁光信号，系统地研究了薄膜样品中的红外霍尔效应。复数频率相关的磁电导张量将被确定。在高温超导体正常状态下的研究中，我们的目标是扩展初步的IR霍尔数据和过去的磁输运工作，这些工作表明这些材料的零场响应和霍尔响应受不同的驰豫过程控制。在超导态中，主要的目标是提供现象学，使我们能够理解高T_c超导体中的涡旋动力学。拟议中的研究在超导研究方面开辟了新的天地，它们有望为超导体的科学和技术开辟新的道路。它们代表了对这些材料中载流子动力学的研究，这些材料显示了反常的非费米液体行为。它们覆盖了与这些材料中重要的相互作用能量相对应的频率范围。这一结果可能为研究高温超导的机制提供重要的新见解。该项目涉及红外材料物理本科生、研究生和博士后的培训。这个项目来自马里兰大学的一位资深教授，该项目包括对具有强相互作用电子的材料的磁光研究，集中在铜酸盐高温超导体上。测量将在高磁场和低温下进行。利用最近发展起来的高灵敏度红外偏振调制技术，将在薄膜样品中测量红外(IR)霍尔效应。这些研究探索了这些材料的电学性质，与传统的金属和超导体相比，这些材料看起来非常反常。它们在高温超导研究方面开辟了新的天地，并有望为这些材料的科学和技术开辟新的道路。它们覆盖了与这些材料中电子的重要相互作用能量相对应的频率范围。这些结果可能会对高温超导的机制以及对具有强相互作用电子的材料的理解提供重要的新见解。该项目涉及红外材料物理本科生、研究生和博士后的培训。***

This project from an established professor at the University of Maryland consists of infrared (IR) and microwave magneto-optical studies of strongly correlated transition metal oxide metals, concentrating on the cuprate high temperature superconductors. Systematic investigations of the infrared Hall effect in thin film samples will be made using recently developed highly sensitive polarization modulation techniques to detect the small magneto-optical signals. The complex frequency-dependent magnetoconductivity tensor will be determined. In the studies in the normal state of high temperature superconductors the objectives are to expand on preliminary IR Hall data and past magneto-transport work that shows that the zero field response and the Hall response of these materials are governed by different relaxation processes. In the superconducting state the main goal is to provide the phenomenology that will allow an understanding of vortex dynamics in high Tc superconductors. The proposed studies break new ground in superconductivity research and they hold the promise of opening new paths for the science and technology of superconductors. They represent studies of the carrier dynamics in these materials which show anomalous non-Fermi liquid behavior. They cover the frequency range that corresponds to the important interaction energies in these materials. The results may provide important new insights into the mechanisms of high temperature superconductivity. The program involves the training of undergraduates, graduate students and post-docs in IR materials physics. %%%This project from an established professor at the University of Maryland consists of magneto-optical studies of materials with strongly interacting electrons, concentrating on the cuprate high temperature superconductors. The measurements will be made at high magnetic fields and cryogenic temperatures. The infrared (IR) Hall effect will be measured in thin film samples using recently developed highly sensitive infrared polarization modulation techniques. The studies probe the electrical properties of these materials that appear highly anomalous in comparison with traditional metals and superconductors. They break new ground in high temperature superconductivity research and they hold the promise of opening new paths for the science and technology of these materials. They cover the frequency range corresponding to the important interaction energies of the electrons in these materials. The results may provide important new insights into the mechanisms of high temperature superconductivity and in the understanding of materials with strongly interacting electrons in general. The program involves the training of undergraduates, graduate students and post-docs in IR materials physics. ***