Magnetic exchange interaction across a vacuum barrier at the single-atom scale

单原子尺度上跨越真空势垒的磁交换相互作用

• 批准号: 530143589
• 负责人: Professor Dr. Jörg Kröger
• 金额: --
• 依托单位: IPCMS - Institut de Physique et Chimie des Matériaux de Strasbourg
• 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/530143589?language=en
• 关键词: Magnetic; exchange; interaction; across; vacuum

The decoration of a metal probe tip by a molecule intentionally picked up from a surface is a powerful method to improve the measurement capabilities of scanning probe microscopes. The proposal aims at generalizing the use of a molecular tip to explore surface magnetism at the atomic scale. Tips of a scanning tunneling and of an atomic force microscope will be terminated with a single spin-active metallocene molecule to measure the magnetic exchange field spin polarization above surfaces with atomic resolution. The objects to be studied range from single atoms and molecules to clusters and ultrathin films with collinear and noncollinear magnetic texture. To preserve genuine magnetic properties to a maximum extent even after adsorption, adsorbates will also be anchored to the surface via intermediate graphene acting as a decoupling buffer layer. State-of-the-art density functional theory calculations complement the experiments.

通过从表面有意拾取的分子装饰金属探针尖端是提高扫描探针显微镜测量能力的有力方法。该提案旨在推广使用分子尖端在原子尺度上探索表面磁性。扫描隧道和原子力显微镜的尖端将终止于单个自旋活性茂金属分子，以原子分辨率测量表面上方的磁交换场自旋极化。所研究的对象从单个原子和分子到具有共线和非共线磁织构的团簇和薄膜。为了即使在吸附后也能最大程度地保持真正的磁性，吸附物也将通过中间石墨烯作为去耦缓冲层锚定到表面。最先进的密度泛函理论计算补充了实验。