Studies of Correlated Electron Effects in Anisotropic Metals and Superconductors

08/29/95 2 9805784 Agosta这个实验研究项目集中在高度各向异性材料的相关电子性质上，包括有机超导体和氧化钼青铜。高度相关的电子性质包括自旋密度波、电荷密度波、量子霍尔效应和多序参数超导电性。这些实验利用了在独特的内部脉冲磁场设施以及NHMFL获得的高磁场。这些研究还采用了高压和低温。强磁场部分用于熄灭超导或其他相关电子态，允许观察量子振荡和其他效应，以探测费米面。除了测量电子传输特性外，还测量了射频穿透深度。这一基础调查的结果可能包括基本的新物理效应，也可能提供对包括半导体微电子设备在内的其他系统中电子行为的洞察。这个高度跨学科的项目涉及在两个实验室地点进行论文研究的研究生，并接受对未来在工业、政府或学术界的职业有益的优秀培训。这个实验研究项目专注于不寻常的和潜在有用的电子导电材料，这种材料在两个主要方面不同于常见的金属，如铜和银。首先，它们是由有机分子或金属氧化物组成的。其次，它们在不同方向上的导电性非常不同。其中一些材料的电子传导各向异性倾向于一个特定的方向，因此它们是“一维”的；在另一些情况下，存在高导电性的平面，这是“二维”导体。电子在这些条件下的行为往往是不寻常的，而这种不寻常的行为及其原因是研究的主题。这个项目感兴趣的材料主要是有机超导体和氧化钼青铜。测量的特点是高磁场，由独特的内部脉冲磁场设施以及位于佛罗里达州立大学的NSF支持的国家高磁场实验室(NHMFL)获得。测量还包括使用高压和低温。这一基础研究的结果可能包括基本的新物理效应，也可能为包括半导体微电子器件在内的其他系统中的电子行为提供洞察。这个高度跨学科的项目涉及在两个实验室进行论文研究的研究生，他们接受了对未来在工业、政府或学术界的职业有益的优秀培训。***

08/29/95 2 9805784 Agosta This experimental research project focuses on the correlated electron properties of highly anisotropic materials, including organic superconductors and molybdenum oxide bronzes. Highly correlated electron properties of interest include spin density waves, charge density waves, the quantum Hall effect and multiple order parameter superconductivity. The experiments utilize high magnetic fields, obtained at a unique in-house pulsed magnetic field facility, as well as at NHMFL. The studies also feature use of high pressure and low temperature. High magnetic field is used in part to quench the superconducting or other correlated electron state, allowing observation of quantum oscillations and other effects to probe the Fermi surface. The RF penetration depth is measured in addition to electronic transport properties. The results from this basic investigation may include fundamental new physical effects and also may provide insight into electron behavior in other systems including semiconductor microelectronic devices.This highly interdisciplinary project involves graduate students who pursue thesis research at both laboratory locations, and receive excellent training beneficial to a future career in industry, government or academia. %%% This experimental research project focuses on unusual and potentially useful electronic conducting materials, which differ from common metals such as copper and silver in two major respects. First, the are composed of organic molecules, or oxides of metals. Second, they have very different electrical conduction in different directions. The anisotropy of the electron conduction in some of these materials tends to favor one particular direction, so they are "one-dimensional"; in other cases planes are present which are highly conductive, and this is a "two-dimensional" conductor. The behavior of electrons under these conditions is often unusual, and this unusual behavior and the reasons for it are the topic of the research. The materials of interest in this project are mostly organic superconductors and molybdenum oxide bronzes. Measurements feature high magnetic fields, obtained at a unique in-house pulsed magnetic field facility, as well as at the NSF-supported National High Magnetic Field Laboratory (NHMFL) located at Florida State University. Measurements also feature use of high pressure and low temperature. The results from this basic investigation may include fundamental new physical effects and also may provide insight into electron behavior in other systems including semiconductor microelectronic devices. This highly interdisciplinary project involves graduate students who pursue thesis research at both laboratory locations, and receive excellent training beneficial to a future career in industry, government or academia. ***