Superconducting resonators for high field quantum materials characterisation

用于高场量子材料表征的超导谐振器

• 批准号: 2892112
• 金额: --
• 依托单位: CARDIFF UNIVERSITY
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2892112
• 关键词: Superconducting; resonators; field; quantum; materials

The goal of this studentship is to develop superconducting resonators as a probe for investigating coupled exotic magnetic materials. The resonator must operate under high magnetic fields to access phenomena such as quantum criticality and frustrated magnetism in the coupled material. Using superconducting resonators for indirect materials characterisation is well-established but has previously relied on "traditional" materials that cease to superconduct in high magnetic fields; the materials we wish to characterise are often only interesting under such a high field. At Cardiff University, we have pioneered the use of superconducting boron-doped nanocrystalline diamond (BNCD) for device applications and previous Cardiff-led research has shown that BNCD can withstand sufficiently high fields to make it an ideal material for this purpose. We have also recently recently shown a prototype device demonstrating that BNCD has the properties required for an enhanced shift to its resonant frequency when coupled to a material of interest. Within this project, the student will design, simulate, fabricate and measure superconducting resonators with starting parameters determined from our proof-of-concept prototype, and determine the predicted shift in the resonant frequency under a magnetic field when specific materials are brought close to the device. The simulations will benchmark experimental applications of the device measured using a dilution fridge with a base temperature of 10mK and magnetic fields up to 8T.

该学生的目的是开发超导谐振器作为研究耦合的外来磁性材料的探测器。谐振器必须在高磁场下运行，以获取现象，例如量子关键性和耦合材料中沮丧的磁性。使用超导谐振器进行间接材料表征是良好的，但以前依赖于“传统”材料，这些材料在高磁场中停止了超导。我们希望表征的材料通常只在如此高的领域下很有趣。在加的夫大学，我们开创了使用超导硼掺杂的纳米晶钻（BNCD）进行设备应用的使用，并且先前由加的夫领导的研究表明，BNCD可以承受足够高的高领域，以使其成为此目的的理想材料。最近，我们最近还展示了一种原型设备，该原型设备表明，BNCD与感兴趣的材料耦合时具有增强向其谐振频率转移所需的属性。在该项目中，学生将使用我们的概念验证原型确定的启动参数设计，模拟，制造和测量超导谐振器，并确定当特定材料带到设备附近时，在磁场下谐振频率的预测变化。模拟将使用稀释冰箱进行测量的设备实验应用，其基本温度为10MK，磁场的实验性最高为8T。