RUI: Quantum Criticality, Frustrated Magnetism and Disorder

技术摘要：该项目旨在了解凝聚态系统中物质的相变和新相的出现。这个项目特别感兴趣的是量子临界性的研究，量子临界性是一种表明相变发生在绝对零度温度下的材料行为。该项目还试图理解受挫磁性材料的新状态，如“自旋液体”和非磁性“隐序”相。研究磁性失序对新合成金属玻璃行为的影响是本课题的第三个重点。该项目中用于研究这些“强相关”材料的技术主要是核磁共振（NMR）和介子自旋（muSR）。将研究的材料有：Yb3Pt4（量子临界），Pr2Zr2O7和Pr2Ir2O7（失磁），以及掺杂Gd（无序磁态）的大块金属玻璃。项目实验将在CSULA学生的参与下进行，包括当地和加拿大和美国的用户设施。与CSULA物理系大学预科项目（UPP）的合作将实施，以吸引UPP学生参加暑期研究实习。这次合作将为市中心高中学生进行科学实地考察和一般物理实验室练习，为少数民族学生提供实践经验。该项目将促进来自邻近的阿尔罕布拉高中的积极学生参与研究和科学展览。该项目旨在了解在新型固体和流体中物质的相变和新相的出现。有趣的新物质状态源于合适材料内部强相互作用的原子粒子的集体行为。该项目研究了这些材料在极低温度下的行为。要研究的三种主要现象被称为“量子临界”、“失磁”和“磁性紊乱”。该项目中用于研究这些“强相关”材料的技术将主要是核磁共振（NMR）和μ子自旋（muSR）。了解这些现象对于开发新的和改进的材料在未来的潜在应用至关重要。项目活动将在CSULA学生的参与下进行，包括当地和加拿大和美国的用户设施。与CSULA物理系大学预科项目（UPP）的合作将实施，以吸引UPP学生参加暑期研究实习。在这次合作中，将为市中心的高中生进行科学实地考察，以提高科学和技术的意识，同时为少数民族学生提供实践经验。来自邻近的阿尔罕布拉高中的积极的学生将参与研究，该项目将促进他们参与州和国家级的科学展览。

TECHNICAL ABSTRACTThe project is aimed at understanding phase transformations and the appearance of new phases of matter in condensed matter systems. Of particular interest to this project is the study of quantum criticality, a type of material behavior that indicates that a phase transformation is occurring at the absolute zero of temperature. The project also seeks to understand novel states of frustrated magnetic materials such as "spin liquids" and non-magnetic "hidden order" phases. The study of the effects of magnetic disordered in the behavior of newly synthesized metallic glasses is the third focal point of this project. The techniques used in the project to study these "strongly correlated" materials are mainly nuclear magnetic resonance (NMR), and muon spin rotation (muSR). Examples of materials that will be studied are: Yb3Pt4 (quantum criticality), Pr2Zr2O7 and Pr2Ir2O7 (frustrated magnetism), and bulk metallic glasses doped with Gd (disordered magnetic states). The project experiments will be carried out with the participation of CSULA students, both locally and at user facilities in Canada and the USA. A collaboration with CSULA Physics Department's University Preparatory Program (UPP) will be implemented to engage UPP students in summer research internships. Science field trips and general physics laboratory exercises for inner city high school students will be carried out in this collaboration to provide minority students with hands-on experiences. The project will facilitate the participation in research and science fairs of motivated students from neighboring Alhambra High School.NON-TECHNICAL ABSTRACTThe project is aimed at understanding phase transformations and the appearance of new phases of matter in novel solids and fluids. Interesting new states of matter derive from the collective behavior of strongly interacting atomic particles in the interior of a suitable material. The project studies the behavior of these materials at very low temperatures. The three main phenomena to study go by the names of "quantum criticality," "frustrated magnetism," and "magnetic disorder." The techniques used in the project to study these "strongly correlated" materials will be mainly nuclear magnetic resonance (NMR) and muon spin rotation (muSR). Understanding these phenomena is of fundamental importance for the development of new and improved materials for potential applications in the future. The project activities will be carried out with the participation of CSULA students, both locally and at user facilities in Canada and the USA. A collaboration with CSULA Physics Department's University Preparatory Program (UPP) will be implemented to engage UPP students in summer research internships. Science field trips for inner city high school students will be carried out in this collaboration to increase awareness of science and technology, while providing minority students with hands-on experiences. Motivated students from neighboring Alhambra High School will participate in research and the project will promote their involvement in science fairs at state and national levels.