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

在化学系化学结构、动力学和机理A （CSDM-A）项目的支持下，田纳西大学的Janice Musfeldt正在使用各种光谱测量来研究高磁场、压力和应变下分子多铁性物质的性质。这些化合物表现出可调的化学性质和整体低能级的竞争相。通过施加外部刺激，分子的电荷、轨道、结构和磁性发生变化。Musfeldt博士和她的学生将测量这些变化，以开发相图，揭示耦合过程，测试手性在建立功能中的作用，并建立以前未观察到的相的路线。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有关的问题。这个项目将有助于建立化学/物理界面的未来劳动力，因为进行这些实验的学生将接受自旋电子学和量子信息科学的培训。根据该奖项，将使用二色性、拉曼和红外光谱研究外部刺激下分子多铁性、量子磁体和自旋量子位的光谱特性，以揭示这些化学系统中物质的新状态。寻找这些化合物中电荷、自旋和晶格自由度之间的相互作用。结构-性质关系将通过检查非互反效应，测试策略来消除振动退相干，并在颜色变化材料中剪裁金属环境来探索。通过在良好控制的极端条件下结合分子多铁性的光-物质相互作用，该团队寻求开发改进的化学和物理可调性方法。田纳西大学的研究小组还将继续发展基础理论，并研究与这些分子多铁性材料在外部刺激下的行为相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。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值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.