Transition Metal Oxides with Correlated Electronic Properties: Synthesis and Characterization

技术说明实验计划的重点是合成接近电子和结构不稳定的强关联电子系统的新材料，并以可控的方式微调通过不稳定区域的竞争电子相互作用。经验表明，当存在竞争性电子相互作用时，具有新颖和有用行为的材料很可能被发现。在低维(LD)材料中，竞争电子相互作用的相互作用被增强。本项目的目标是合成和表征具有准低维性质的新型还原和氧化过渡金属化合物。感兴趣的体系包括过渡金属钙钛矿基氧化物、Ruddlesden-Popper相和层状双钙钛矿。非技术解释这些研究不仅有望从根本上理解和控制新型电子和磁性材料的性质，而且还将为计算机、传感器和通信等微电子和磁电子领域的潜在应用提供先进的材料。这些都是保持美国在全球技术领先地位的关键领域。此外，固体化学/材料科学的本科生、研究生和博士后研究员的教育和培训对于迎接二十一世纪的技术挑战至关重要。这项研究是高度跨学科的。该研究所与其他化学家、物理学家和陶瓷学家的合作工作在国内和国际上都得到了广泛的认可。这项工作的单晶和其他物质产品被提供给科学界作进一步研究。工业界对这些领域非常感兴趣，在这些领域接受培训的学生在就业市场上具有很强的竞争力。

TECHNICAL EXPLANATION The focus of the experimental program is to synthesize new materials of strongly correlated electron systems that are near electronic and structural instabilities, and to fine-tune the competing electronic interactions through the unstable region in a controlled way. Experience shows that materials with novel and useful behavior are likely to be discovered when competing electronic interactions exist. In low-dimensional (LD) materials the interplay of competing electronic interactions is enhanced. The object of this project is the synthesis and characterization of new reduced and oxidized-transition metal compounds with quasi-Low Dimensional properties. Systems of interest include transition metal perovskite-based oxides, Ruddlesden-Popper phases, and layered double perovskites.NON-TECHNICAL EXPLANATIONThese studies are expected to yield not only fundamental understanding and control of the properties of novel electronic and magnetic materials, but also to provide advanced materials for potential applications in microelectronics and magnetoelectronics including computers, sensors and communications. These are critical areas for maintaining US technological leadership worldwide. Moreover, the education and training of undergraduate and graduate students and postdoctoral fellows in solid-state chemistry/materials science is essential to meet the technological challenges of the twenty first century. The research is highly interdisciplinary. Collaborative work of the PI with other chemists, physicists and ceramicists is well established nationally and internationally. Single crystal and other material products of the work are provided to the scientific community for further investigations. These areas are of high interest to industry, and students trained in these areas are very competitive in the job market.