Pulse-tube refrigerator physical property measurement system with 9 Tesla magnet

物理性质的研究，如热容量或电输运作为温度和磁场的函数，对于表征和详细研究新材料至关重要。我们的小组专注于强电子相关效应，所产生的部分占用的d-或f-壳层。我们感兴趣的是物质的新量子态及其低能激发，例如重费米子系统中量子临界引起的非费米液体行为，非常规超导性，磁阻挫和量子自旋液体行为。为此，我们利用各种技术合成单晶和多晶，薄膜和异质结构。我们申请了一个脉冲管制冷机物理性能测量系统（PPMS），该系统配备9特斯拉磁体，可测量1.8 - 400 K温度范围内的热容和电输运。该系统还将与我们的14 T液氦PPMS的3-氦冷却器和其他几个选项（用于热传输，磁化和电容测量）兼容，这些选项已被高度超额预订。所申请的主要研究仪器将绕过这一瓶颈，为我们提供一个重要的独立于供应的液氦。计划利用所申请的PPMS进行的研究项目包括：·研究Kitaev材料中的奇异基态和激发态·研究新的几何阻挫稀土氧化物中的量子自旋液体行为和场诱导相·金属Kagome层稀土化合物中的磁阻挫和新相·新型层状铁磷属元素化物和重费米子金属的设计和表征

The study of physical properties such as e.g. heat capacity or electrical transport as function of temperature and magnetic field is essential for the characterization and detailed investigation of novel materials. Our group focusses on strong electronic correlation effects, arising from partially occupied d- or f-shells. We are interested in novel quantum states of matter and their low-energy excitations, such as non-Fermi liquid behavior arising from quantum criticality in heavy-fermion systems, unconventional superconductivity, magnetic frustration and quantum spin liquid behavior. To this end, we synthesize single and polycrystals, thin films and heterostructures utilizing various techniques. The applied instrumentation is dedicated to investigate these samples.We apply for a pulse-tube refrigerator physical property measurement system (PPMS) with 9 Tesla magnet and measurement options for heat capacity and electrical transport at temperatures between 1.8 and 400 K. The system will also be compatible with the 3-Helium cooler and several other options (for thermal transport, magnetization and capacitive dilatometry) of our 14 T liquid helium PPMS which is highly overbooked. The requested Major Research Instrumentation will bypass this bottleneck and provide us an important independency from the supply with liquid helium.The planned research projects utilizing the requested PPMS include:• Study of exotic ground states and excitations in Kitaev materials• Investigation of quantum spin liquid behavior and field-induced phases in new geometrically frustrated rare-earth oxides• Magnetic frustration and novel phases in metallic Kagome-layer rare-earth compounds• Design and characterization of novel layered iron-pnictide and heavy-fermion metals