He3-Cryostat with superconducting magnet

带超导磁体的 He3 低温恒温器

• 批准号: 451544120
• 金额: --
• 依托单位: Julius-Maximilians-Universität Würzburg
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2020
• 资助国家: 德国
• 起止时间: 2019-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/451544120?language=en
• 关键词: He3; Cryostat; superconducting; magnet

We request funding for a He3-cooled cryostat with a superconducting magnet for the integration of a home-built scanning tunneling microscope. In order to meet the scientific goals specified below we aim for a sample temperature < 500 mK. Low mechanical noise is required for reliable operation of the scanning tunneling microscope. The integration in an already existing ultra-high vacuum system requires CF-compatible flanges. The cryostat will be used for reaching the following scientific goals: (i) The investigation of potential topological superconductors and (ii) the characterization of electronic states of pure and (magnetically) doped topological insulators. The new system will enable us to achieve better insight into the above-mentioned material systems. We will design and assemble a low-temperature scanning tunneling microscope with a base sample temperature between 350 mK bis 500 mK, thereby enhancing the energy resolution by about a factor of 2,5–3 in comparison to microscopes already in use in our research group. In the context of (i) the requested setup will be enable us to access sample systems the superconducting properties of which could not be investigated so far because of their very low critical temperature. Furthermore, the much better energy resolution will allow for a better separation between potential Majorana states and other, competing effects, such as Shiba and Caroli-de Gennes-Matricon states. Regarding (ii) the enhanced energy resolution will allow for a better understanding of the Landau level life time in topological insulators where we hope to unravel the relevant scattering properties.

我们要求使用家庭建造的扫描调节显微镜为HE3冷冻的低温固定，而下面指定的科学目标我们的目标温度<500 mk。组成的ges。看到上述系统。我们将设计和组装低温扫描，并使用显微镜使用显微镜进行调音，并在350 MK BIS 500 MK之间进行基础采样的调整，从而与UP相比，可以使用2,5-3的能量。在（i）的背景下，请求的设置将使我们能够访问样本系统，因为它们的临界温度非常低，因此无法研究其超导性能。在潜在的主要国家和其他竞争效果之间，例如shiba和caroli-de gennes-matricon状态。 。