CAREER: NMR Studies of Quantum Fluctuations in Strongly Correlated Systems in High Magnetic Fields and at Low Temperatures

*非技术摘要*材料中的许多磁性现象仍有待理解。人们对回答基本问题的兴趣与寻找用于自旋设备的新材料的技术驱动是同步的。布朗大学这个教师早期职业发展项目的目标是利用磁共振技术研究新型磁性材料的量子性质。在非常低的温度下，可以有效地利用强磁场来操纵此类系统中的量子态。非侵入性的显微技术，如磁共振，对电子的自旋和电荷都很敏感，在阐明这些新的物质状态的性质方面可以非常强大。这个项目的最终目标是回答有关量子磁学的基本问题，并发现新的集体现象。这些项目的教育价值源于研究生和本科生的广泛参与。在强磁场设施中进行研究将对培养学生特别有益。此外，还将提供在现代凝聚态研究中使用光谱技术的短期研讨会课程。此外，外展将针对较小的儿童，目标是最终增加物理专业的多样性。*布朗大学教师早期职业发展项目的目标是使用磁共振技术研究强关联的磁性材料。现代凝聚态物理学的挑战之一是理解物质中量子相和相变的本质。这个项目将专注于研究受挫的量子磁铁。这些材料特别令人感兴趣，因为它们可以用来测试对量子相变和竞争量子相互作用的影响的理论预测，这些相互作用可以通过施加外部磁场来调节。这项研究的最终目的是阐明受挫量子磁体中基态的性质，并为从理论上理解强关联凝聚态系统提供重要的约束。这些项目的教育价值源于研究生和本科生的广泛参与。在强磁场设施中进行研究将对培养学生特别有益。此外，还将提供在现代凝聚态研究中使用光谱技术的短期研讨会课程。此外，将针对较小的儿童开展外联活动，目标是最终增加物理专业的多样性。

******NON-TECHNICAL ABSTRACT*****Many magnetic phenomena in materials remain to be understood. The interest in answering fundamental questions runs in parallel with the technological drive to find new materials for use in spin-based devices. The goal of this Faculty Early Career Development project at Brown University is to investigate the quantum nature of novel magnetic materials using magnetic resonance techniques. At very low temperatures, a strong magnetic field can be effectively used to manipulate the quantum states in such systems. Non-invasive microscopic techniques, such as magnetic resonance, sensitive to both spin and charge of an electron can be very powerful in elucidating nature of these new states of matter. The ultimate goal of this project is to answer fundamental questions regarding quantum magnetism and to discover new collective phenomena. The educational value of these projects arises from the extensive participation of both graduate and undergraduate students. Conducting research at the high magnetic field facilities will be of particular benefit in training students. In addition, short seminar courses on spectroscopic techniques used in modern condensed matter studies will be offered. Furthermore outreach will be targeted at younger children with the goal of eventually increasing the diversity of the physics profession.****** TECHNICAL ABSTRACT*****The goal of this Faculty Early Career Development project at Brown University is to investigate strongly correlated magnetic materials using magnetic resonance techniques. One of the challenges of modern condensed matter physics is to understand the nature of quantum phases and phase transitions in matter. This project will focus on the study of frustrated quantum magnets. These materials are of particular interest since they can be used to test theoretical predictions on quantum phase transitions and the effects of competing quantum interactions, tunable by the application of an external magnetic field. The ultimate goal of the research is to clarify the nature of the ground states in frustrated quantum magnets and provide important constraints on the theoretical understanding of strongly correlated condensed matter systems. The educational value of these projects arises from the extensive participation of both graduate and undergraduate students. Conducting research at the high magnetic field facilities will be of particular benefit in training students. In addition, short seminar courses on spectroscopic techniques used in modern condensed matter studies will be offered. Furthermore outreach will be targeted at younger children with the goal of eventually increasing the diversity of the physics profession.