Electronic Properties of Transition Metal Oxides

过渡金属氧化物的电子性质

• 批准号: 0102415
• 负责人: Carmen Almasan
• 金额: $ 27万
• 依托单位: Kent State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-07-01 至 2005-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0102415&HistoricalAwards=false
• 关键词: Electronic; Properties; Transition; Metal; Oxides

This individual investigator award will fund research focused on studies of the in-plane and out-of-plane normal-state electrical conduction of high quality single crystals of selected copper-oxide superconductors and layered manganites. The emphasis of the experimental project on the cuprates will be on the transformation of their normal-state conduction across the phase diagram which includes insulating, under-doped, and over-doped regimes. The electrical transport and magnetization data obtained will be analyzed for information about conduction mechanisms. Layered manganites have a rich phase diagram which includes several phase transitions. These thermodynamic phase transitions have a strong effect on the charge transport. The emphasis of the manganite research will be on the effect of thermodynamic phase transitions on the electrical conduction. The research is expected to significantly enhance our fundamental understanding of the electrical behaviors of cuprates and manganites. More broadly, the results from this basic investigation may provide insight into appropriate doping schemes to facilitate applications of cuprates and manganites for electronic sensors and devices such as magnetic field sensors or even computer logic devices. This highly interdisciplinary project will contribute to the education and training of doctoral and undergraduate students, as well as postdoctoral researchers at the institutions which are part of the collaboration. The diversity of expertise gained by the participants in this research program is a substantial advantage in today's knowledge based, technology driven economy, being beneficial to a future career in industry, government, or academia.%%%This individual investigator award will fund an experimental research project to study the unusual electrical properties of high temperature superconductors and layered manganites. The high temperature superconductors, even in the normal state, conduct electricity in ways that are very different from typical electrical conductors such as copper and silicon. Also, the conduction of electricity in manganites is strongly affected by thermodynamic phase transitions. The proposed research is expected to significantly enhance our fundamental understanding of the electrical behaviors of cuprates and manganites. Clarifying these novel electrical behaviors may contribute to eventual applications of these materials for electronic sensors and devices such as magnetic field sensors or even computer logic devices. This project offers excellent research and education opportunities for graduate students within an interdisciplinary program. It involves minority-group graduate students who pursue thesis research and receive excellent training beneficial to a future career in industry, government, or academia. ***

该个人研究者奖将资助研究重点放在选定的氧化铜超导体和层状锰氧化物的高质量单晶的面内和面外正常态导电的研究。 对铜酸盐的实验项目的重点将是他们的正常状态的转变，其整个相图，其中包括绝缘，欠掺杂，和过掺杂制度。 所获得的电输运和磁化数据将被分析用于传导机制的信息。 层状锰氧化物具有丰富的相图，其中包括几个相变。 这些热力学相变对电荷输运有很强的影响。 锰氧化物研究的重点将是热力学相变对导电性的影响。 该研究有望大大提高我们对铜酸盐和锰氧化物电学行为的基本理解。 更广泛地说，从这个基础研究的结果可以提供洞察适当的掺杂方案，以促进铜酸盐和锰氧化物的电子传感器和设备，如磁场传感器，甚至计算机逻辑器件的应用。 这一高度跨学科的项目将有助于教育和培训博士生和本科生，以及合作机构的博士后研究人员。 参与者在这项研究计划中获得的专业知识的多样性是当今以知识为基础，技术驱动的经济中的一个重要优势，有利于未来在工业，政府或学术界的职业生涯。这个个人研究者奖将资助一个实验研究项目，以研究高温超导体和层状锰氧化物的不寻常的电气特性。 高温超导体，即使在正常状态下，导电的方式也与典型的电导体如铜和硅非常不同。 此外，锰氧化物中的电传导受到热力学相变的强烈影响。 这项研究有望大大提高我们对铜酸盐和锰氧化物电学行为的基本理解。 阐明这些新颖的电学行为可能有助于这些材料用于电子传感器和器件（例如磁场传感器或甚至计算机逻辑器件）的最终应用。 该项目为跨学科项目中的研究生提供了极好的研究和教育机会。 它涉及少数群体研究生，他们从事论文研究并接受优秀的培训，有利于未来在工业，政府或学术界的职业生涯。 ***