MRI: Acquisition of multi-use cryostat/magnet “Physical Properties Measurement System” for studying quantum materials

寻找具有所需量子性质的新材料和工程系统有望不仅使基础固态物理实现飞跃，也使量子信息处理和量子传感实现飞跃。该项目获得了一个通用的共享使用系统，用于研究新型量子力学器件和材料在低温和强磁场下的物理性质。该系统的模块化和可扩充性允许检查广泛的影响。与此同时，该系统的交钥匙性质使其非常适合作为培训下一代科学研究人员的平台，无论是在实验材料科学和凝聚态物理的课堂作业中，还是在参与该项目的科学家的实验室里执行暑期研究项目的本科生和高中生。该项目购买了一个多用途低温恒温器，其标准配置的温度范围从1.8至400K，以及带有稀释制冷插件的50MK。与14T磁铁相结合，可以在很大范围的参数空间内测量材料。该系统的基本能力由几个测量模块利用，包括磁化、比热和磁化率，以执行新量子材料的多模式测量。研究项目包括一个关于范德华异质结构的广泛计划，其中单层石墨烯的工程应变已被证明可以提供对电子关联和磁态的广泛控制，以及由多层石墨烯和过渡金属二卤化物构建的莫尔超晶格导致奇异的量子相。在亚开尔文区域的磁化率测量表征了用于高效率量子转换设备的稀土反铁磁体。另一种量子传输平台，场调谐超导谐振器，通过微波阻抗测量进行了表征。磁化和电阻率的快速循环测试支持在超快光学测量之前表征各种相关的电子和磁性材料。在图案化的2D等离子体材料上测量依赖于温度的霍尔效应可以洞察共振的迁移率和衰减路径。电磁联合测量探测未来电池正极设计的候选材料的电化学。该奖项反映了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。

Searching for new materials and engineering systems with desired quantum properties holds promise to enable leaps not only in fundamental solid-state physics but also in quantum information processing and quantum sensing. This project acquires a versatile shared-use system for studying the physical properties of new quantum-mechanical devices and materials at low temperatures and high magnetic fields. The modular and extensible nature of the system allows for a wide range of effects to be examined. At the same time, the turnkey nature of the system makes it well suited as a platform for training the next generation of scientific researchers, both in the context of classwork in experimental materials science and condensed-matter physics and for undergraduate and high-school students performing summer research programs in the laboratories of the scientists involved in the project. The project acquires a multi-use cryostat, with temperatures ranging from 1.8 to 400 K in its standard configuration and to 50 mK with an included dilution-refrigeration insert. Combined with a 14 T magnet, this enables measuring materials over a broad range of parameter space. The base capabilities of the system are leveraged by several measurement modules including magnetization, specific heat, and susceptibility to perform multimodal measurements of new quantum materials. Research projects include an extensive program on van der Waals heterostructures, where engineering strain into monolayer graphene has been shown to provide a wide range of control over the electronic correlation and magnetic states, and the construction of Moire superlattices built from multilayer graphene and transition metal dichalcogenides lead to exotic quantum phases. Magnetic susceptibility measurements in the sub-Kelvin regime characterize rare-earth antiferromagnets for use in high-efficiency quantum transduction devices. Another platform for quantum transduction, field-tuned superconducting resonators, are characterized via microwave impedance measurements. Rapid-cycle testing of magnetization and resistivity support characterizing a wide variety of correlated electronic and magnetic materials prior to ultra-fast optical measurements. Temperature-dependent Hall Effect measurements on patterned 2D plasmonic materials yield insight into the mobilities and damping pathways of the resonances. Combined electrical and magnetic measurements probe the electrochemistry of candidate materials for future battery cathode designs.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.