Surface and Bulk Properties of Layered Transition-Metal Compounds: Manifestations of Broken Symmetry

层状过渡金属化合物的表面和体积性质：破缺对称性的表现

• 批准号: 1504226
• 负责人: Rongying Jin
• 金额: $ 94.7万
• 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: 2015
• 资助国家: 美国
• 起止时间: 2015-09-01 至 2021-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1504226&HistoricalAwards=false
• 关键词: Surface; Bulk; Properties; Layered; Transition

NONTECHNICAL ABSRTACTThis award from the Condensed Matter Physics Program of the Division of Materials Research supports experimental condensed-matter physics research on new class of materials that are relevant to future energy applications and advanced electronic devices. This class of materials, complex transition metal compounds, exhibit new physical properties that cannot be understood with traditional approaches. The complementary expertise of two scientists, one on surface (one atomic layer) and the other on bulk, will allow us to explore the fundamental physics underlying the emergent phenomena seen in both surface and bulk. Creating a surface allows this team to explore the manifestations of broken symmetry on this new class of materials. Our ultimate goal is to address one of the grand challenges of materials science: how do complex phenomena emerge from simple ingredients? Through combined effort of two scientists, this research project offers an ideal training ground for undergraduates, graduate students, postdoctoral fellows, and visiting scholars, exposing them in frontier scientific research. In particular, Ph.D. students, supported through this project, will have hands-on experience in state-of-the-art instrumentation, and be trained for careers either in academia, national laboratories, or industries.TECHNICAL ABSRTACTThis research project, supported by Condensed Matter Physics Program of the Division of Materials Research is designed to study the surface and bulk physical properties of newly discovered transition-metal layered compounds. This class of materials exhibit strong coupling between charge, spin, lattice and orbital. Their physical properties are extremely susceptible to a subtle change either internally (chemical doping), or externally such as magnetic field or pressure. Creating a surface by cleaving these layer-materials is an ideal way to distort the delicate balance in the bulk, and explore the manifestations of broken symmetry. The complementary expertise of two scientists, one on surface and the other on bulk, will allow us to explore the fundamental physics underlying the emergent phenomena in this class of materials. The ultimate goal is to address one of the grand challenges of materials science: how do complex phenomena emerge from simple ingredients? Through combined effort of two scientists, this research project offers an ideal training ground for undergraduates, graduate students, postdoctoral fellows, and visiting scholars, exposing them in frontier scientific research. In particular, Ph.D. students, supported through this project, will have hands-on experience in state-of-the-art instrumentation, and be trained for careers either in academia, national laboratories, or industries. Both of the principal investigators have been hosting students from Louisiana high schools, LSU through the "Chancellor's Future Leaders in Research" program, and NSF supported REU program.

该奖项来自材料研究部凝聚态物理项目，该奖项支持对与未来能源应用和先进电子设备相关的新型材料进行实验凝聚态物理研究。这类材料是复杂的过渡金属化合物，表现出传统方法无法理解的新的物理性质。两位科学家的互补专业知识，一位在表面(一个原子层)，另一位在块体上，将使我们能够探索在表面和块体中看到的紧急现象背后的基本物理。创建一个表面使这个团队能够探索这种新材料上对称性破坏的表现。我们的最终目标是解决材料科学的一个重大挑战：如何从简单的成分中出现复杂的现象？通过两位科学家的共同努力，该研究项目为本科生、研究生、博士后研究员和访问学者提供了一个理想的培训场所，使他们接触到前沿科学研究。特别是，通过这个项目的支持，博士生将拥有最先进的仪器设备的实践经验，并在学术界、国家实验室或工业中接受职业培训。该研究项目由材料研究部凝聚态物理计划支持，旨在研究新发现的过渡金属层状化合物的表面和块体物理性质。这类材料表现出电荷、自旋、晶格和轨道之间的强耦合。它们的物理性质非常容易受到内部(化学掺杂)或外部(如磁场或压力)的微妙变化的影响。通过撕裂这些层状材料来创造一个表面，是扭曲主体中微妙的平衡并探索对称破坏的表现的理想方式。两位科学家的互补专业知识，一位在表面上，另一位在块体上，将使我们能够探索这类材料中新出现的现象背后的基本物理学。最终目标是解决材料科学的一个重大挑战：如何从简单的成分中出现复杂的现象？通过两位科学家的共同努力，该研究项目为本科生、研究生、博士后研究员和访问学者提供了一个理想的培训场所，使他们接触到前沿科学研究。特别是博士生，通过这个项目的支持，将拥有最先进的仪器设备的实践经验，并接受在学术界、国家实验室或行业的职业培训。这两位主要调查人员一直在接待来自路易斯安那州高中、路易斯安那州立大学通过“议长未来研究领袖”项目以及NSF支持的REU项目的学生。