Molecular Multiferroics, Quantum Magnets, and Spin Qubits under External Stimuli

在化学系化学结构、动力学和机制A(CSDM-A)计划的支持下，田纳西大学的Janice MusFeldt正在使用各种光谱测量来研究分子多铁体在强磁场、压力和应变下的性质。这些化合物表现出可调的化学和竞争相，总体上具有低能量尺度。通过施加外部刺激，分子电荷、轨道、结构和磁性发生变化。穆斯菲尔特博士和她的学生将测量这些变化，以绘制相图，揭示耦合过程，测试手性在建立功能中的作用，并建立通往以前未观察到的阶段的路线。他们的发现可以解决与分子量子材料的化学和物理可调性相关的问题。该项目将有助于在化学/物理界面建立未来的劳动力队伍，因为执行这些实验的学生将接受自旋电子学和量子信息科学方面的培训。在该奖项下，将使用二色性、拉曼光谱和红外光谱来研究分子多铁性、量子磁体和自旋量子比特在外部刺激下的光谱性质，以揭示这些化学体系中物质的新状态。研究了这些化合物中电荷、自旋和晶格自由度之间的相互作用。通过研究非互易效应，测试消除振动消相干的策略，以及在变色材料中定制金属环境，将探索结构与性能的关系。通过将分子多铁体在可控的极端条件下的轻物质相互作用结合起来，该团队试图开发出改进的化学和物理可调性方法。田纳西州的团队还将继续研究潜在理论的发展，并检查与这些分子多铁体在外部刺激下的行为有关的关键量子信息概念。通过这种方式，这些研究有可能对理解量子材料做出重要贡献。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

With support from the Chemical Structure, Dynamics, and Mechanisms A (CSDM-A) Program in the Division of Chemistry, Janice Musfeldt of the University of Tennessee is using a variety of spectroscopic measurements to study the properties of molecular multiferroics under high magnetic fields, pressure, and strain. These compounds exhibit tunable chemistry and competing phases with overall low energy scales. By applying external stimuli, molecular charge, orbits, structure, and magnetism change. Dr. Musfeldt and her students will measure these changes to develop phase diagrams, reveal coupling processes, test the role of chirality in establishing functionality, and establish routes to previously unobserved phases. Their discoveries could address questions related to the chemical and physical tunability of molecular quantum materials. This project will help to build the future workforce at the chemistry/physics interface as students performing these experiments will be trained in spintronics and quantum information science. Under this award, the spectroscopic properties of molecular multiferroics, quantum magnets, and spin qubits under external stimuli will be studied using dichroism, Raman, and infrared spectroscopies to reveal new states of matter in these chemical systems. Interactions between the charge, spin, and lattice degrees of freedom in these compounds are sought. Structure-property relationships will be explored by examining nonreciprocal effects, testing strategies for eliminating vibronic decoherence, and tailoring the metal environment in color change materials. By combining light-matter interactions of the molecular multiferroics under well-controlled extreme conditions, the team seeks to develop improved approaches to chemical and physical tunability. The Tennessee team will also pursue the development of underlying theory and examine key quantum information concepts that relate to the behavior of these molecular multiferroics when placed under external stimuli. In this way, these studies have the potential to make important contributions to the understanding of quantum materials.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.