Andreev reflection spectroscopy of magnetic impurities on superconductors at the single-atom level

单原子水平超导体磁性杂质的安德烈耶夫反射光谱

• 批准号: 500665567
• 负责人: Professor Dr. Jörg Kröger
• 金额: --
• 依托单位: Fachgebiet Experimentalphysik I
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/500665567?language=en
• 关键词: Andreev; reflection; spectroscopy; magnetic; impurities

The Andreev reflection will be studied in single-atom and singlemolecule contacts with a scanning tunnelling microscope. By exploiting the advantages of the experimental method, namely the flexibility in choosing the electrode materials – tip and singlecrystalline surface – as well as the atomically precise characterization of the contact, the potential dependence of Andreev reflection on the phase coherence length of the superconductor will be explored. Moreover, the analysis of the spin polarization of the current on the basis of Andreev reflection in macroscopic point contacts comprising magnetic and superconducting electrodes will be transferred and established for single-atom and single-molecule contacts formed with a scanning tunnelling microscope. The use of superconducting tips and samples as well as magnetic impurities adsorbed on either the tip or the sample surface is planned to unveil the relation between Andreev reflection, Yu-Shiba-Rusinov states and the hybridization of the magnetic atoms and molecules with the electrodes.

Andreev反射将用扫描隧道显微镜在单原子和单分子接触中进行研究。通过利用实验方法的优点，即在选择电极材料的灵活性-尖端和erce结晶表面-以及原子精确的表征的接触，安德烈耶夫反射的超导体的相位相干长度的潜在依赖性将被探索。此外，在宏观点接触，包括磁性和超导电极的Andreev反射的基础上的电流的自旋极化的分析将被转移和建立的单原子和单分子接触形成的扫描隧道显微镜。计划使用超导尖端和样品以及吸附在尖端或样品表面上的磁性杂质来揭示Andreev反射，Yu-Shiba-Rusinov状态和磁性原子和分子与电极的杂化之间的关系。