Manifestations of Broken Symmetry in Transition-Metal Layered Compounds: Surface vs. Bulk Properties

过渡金属层状化合物中对称性破缺的表现：表面性质与本体性质

• 批准号: 1002622
• 负责人: E. Ward Plummer
• 金额: $ 39万
• 依托单位: Louisiana State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1002622&HistoricalAwards=false
• 关键词: Manifestations; Broken; Symmetry; Transition; Metal

****NON-TECHNICAL ABSTRACT****This award supports experimental condensed-matter physics research on a new class of materials that are relevant to future energy applications and advanced electronic devices. This class of materials exhibits new physical properties that cannot be understood with traditional ideas. Using the complementary expertise of the investigators, this project will explore the fundamental physics underlying the new emergent phenomena, both at the surface and in the bulk, utilizing the most sophisticated growth and characterization techniques. Any device application will utilize the properties of surfaces or interfaces. The ultimate goal is to address one of the grand challenges of materials science: how do complex phenomena emerge from simple ingredients? This research project offers an ideal training ground for undergraduate and graduate students, post docs, and visiting scholars, exposing them in frontier scientific research. In particular, two PhD students, supported through this project, will obtain hands-on experience in state-of-the-art instrumentation, and will be well trained for future careers either in academia, national laboratories, or industries. In addition undergraduate students, who are "Chancellor's Future Leaders in Research," will spend several years during their undergraduate tenure involved with this project.****TECHNICAL ABSTRACT****This research project is designed to study the surface and bulk physical properties of newly discovered transition-metal layered compounds. This class of materials has characteristically strong coupling between charge, spin, lattice, and orbital degrees of freedom. The physical properties of these materials are extremely susceptible to a subtle change either internally (chemical doping), or externally such as the creation of a surface, or the application of a magnetic field or pressure. Using the complementary expertise of the investigators, this project will explore the fundamental physics underlying the emergent phenomena seen in the bulk or in the environment of broken symmetry generated by the creation of a surface. Research and educational training will utilize the most sophisticated techniques for growth and characterization (on at atomic scale). The ultimate goal is to address one of the grand challenges of materials science: how do complex phenomena emerge from simple ingredients? Two PhD students, supported through this project, will have hands-on experience in frontier scientific research, and be well trained for careers either in academia, national laboratories, or industries. The project will also involve two or more "Chancellor's Future Leaders in Research" undergraduate students during their four years as undergraduates at LSU.

****非技术摘要****该奖项支持与未来能源应用和先进电子设备相关的一类新材料的实验凝聚态物理研究。这类材料表现出用传统观念无法理解的新的物理性质。利用研究人员的互补专业知识，该项目将利用最复杂的生长和表征技术，探索新出现现象的基本物理基础，包括表面和大块。任何设备应用程序都将利用表面或接口的属性。最终目标是解决材料科学的一个重大挑战：复杂的现象是如何从简单的成分中产生的？本研究项目为本科生、研究生、博士后和访问学者提供了理想的培养基地，使他们能够从事前沿科学研究。特别是，通过该项目支持的两名博士生将获得最先进仪器的实践经验，并将为未来在学术界，国家实验室或工业领域的职业生涯提供良好的培训。此外，作为“校长未来研究领袖”的本科生将在他们的本科任期内花几年时间参与这个项目。****技术摘要****本研究项目旨在研究新发现的过渡金属层状化合物的表面和整体物理性质。这类材料具有电荷、自旋、晶格和轨道自由度之间强耦合的特点。这些材料的物理性质非常容易受到内部（化学掺杂）或外部（如表面的产生，或磁场或压力的应用）的细微变化的影响。利用研究人员的互补专业知识，该项目将探索在实体或由表面产生的对称破坏环境中出现的现象的基础物理学。研究和教育培训将利用最复杂的技术进行生长和表征（在原子尺度上）。最终目标是解决材料科学的一个重大挑战：复杂的现象是如何从简单的成分中产生的？通过该项目，两名博士生将获得前沿科学研究的实践经验，并为在学术界、国家实验室或工业领域的职业生涯提供良好的培训。该项目还将涉及两名或两名以上在路易斯安那州立大学就读四年本科的“校长未来研究领袖”本科生。