Dry dilution refrigerator with vector magnet

带矢量磁铁的干稀释冰箱

• 批准号: 464847925
• 金额: --
• 依托单位: Universität Regensburg
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2021
• 资助国家: 德国
• 起止时间: 2020-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/464847925?language=en
• 关键词: Dry; dilution; refrigerator; vector; magnet

We apply for a dry 3He/4He-dilution refrigerator with a cooling power of 250 microwatt at 100 mK, a base temperature of 10 mK, and equipped with a superconducting vector magnet allowing for magnetic fields of 1/3/6 Tesla in the x/y/z-directions.The instrument will be used to gain a deeper understanding of spin-orbit interaction effects in super¬conductivity both in epitaxial Al/InAs-based nanopatterned arrays of Josephson junc-tions and in extended quasi-two-dimensional films. We will investigate novel magneto-electric effects, chiral, and topological phases with the prospect of applications in quantum electronic circuits. Besides standard transport experiments, our experimental tool will be the newly implemented technique of kinetic inductance measurements, which will be systematically applied in two research directions:1) Investigation of spin-orbit interaction-induced supercurrent response, spontaneous supercurrents, and the corresponding magnetization patterns in devices based on epitaxial Al/InAs heterostructures: Here we will combine the above techniques mentioned in order to uncover the expected unconventional flow patterns in combined perpendicular and in-plane magnetic fields. The perpendicular field component tunes the frustration in the system, the in-plane field affects together with the spin-orbit interaction the spin-texture of the Andreev bound states. We expect states with exotic magnetic order resulting from the interaction between the spontaneous ring currents that emerge from spin-orbit interaction in absence of time-reversal symmetry and that can be tuned with the strength and direction of the in-plane magnetic field.2) Search for unconventional superconductivity and magnetoelectric effects in two-dimensional exotic superconductors with strong spin-orbit interaction: We want to employ inductance measurements in order to investigate magneto-electric anisotropy and possible unconventional pairing in Al/InAs(110) and several particularly interesting compound metals: 1) few-layer NbSe2, 2) thin super¬conducting Bi/Ni-bilayers, 3) epitaxial Au/V-bilayers. Common to all material systems is the combinations of supercon-ductivity with extremely strong spin-orbit interaction, and the corresponding prospects for unconventional and topological superconductivity.

我们在100 mk处的冷却功率为250微波，10 mk的基本温度，并配备有超导向载体的磁场，允许磁场在1/3/6 tesla的X/y/z directions中，将使用X/Y/Z型的磁场，将其用于X/Y/Z-段的磁场。 Josephson Junc-tions的Al/INAS纳米图案阵列，并在延长的准二维电影中。我们将研究新颖的磁电效应，手性和拓扑阶段，并在量子电子电路中应用。 Besides standard transport experiments, our experimental tool will be the newly implemented technique of kinetic inductance measurements, which will be systematically applied in two research directions:1) Investigation of spin-orbit interaction-induced supercurrent response, sponsoreous supercurrents, and the Corresponding magnetic patterns in devices based on epitaxial Al/InAs heterostructures: Here we will combine the above techniques mentioned in order to uncover the垂直和面内磁场组合的预期非常规的流动模式。垂直的场分量调整了系统中的挫败感，面内场与自旋轨道相互作用以及Andreev结合状态的自旋纹理影响。我们期望状态具有异国情调的磁顺序，这是由于在没有时间反向对称性的情况下从旋转轨道相互作用而出现的赞助环电流产生的，并且可以通过平面磁场的强度和方向进行调整。为了研究Al/Inas（110）和几种特别有趣的复合金属的测量，以研究磁电动各向异性和可能的​​非常规配对：1）几层NBSE2，2）薄超导BI/NI-BILAYERS，3）表面上的AU/V-BILAYER。所有材料系统共有的是超级通用性与极强的自旋轨道相互作用的组合，以及非常规和拓扑超导性的相应前景。