Electronic structure and magnetism of surface supported 3D and 4D Metal Clusters

在该项目中，我们计划对表面支撑的3D和4D金属团簇的磁性、电子和几何结构之间的相关性进行实验研究。我们想在原子尺度上探索决定磁矩和磁各向异性的因素。我们研究了磁性如何依赖于团簇的大小和形状以及衬底材料和取向。实验的重点是铂和银表面上的铁和铑原子簇。我们比较了从气相沉积的团簇和通过自组织在衬底上形成的团簇的性质。用扫描隧道显微镜、扫描隧道谱和X射线磁性圆二色谱等局域积分技术研究了团簇的结构、电子性质和磁性。通过在Ag(100)衬底上外延氧化镁隔离层，研究了金属衬底对团簇性质的影响。

Within the project we plan to investigate experimentally the correlation between magnetism, the electronic and the geometrical structure of surface-supported 3D and 4D Metal Clusters. We want to explore the determining factors for the magnetic moment and the magnetic anisotropy on the atomic scale. We study how the magnetic properties depend on the cluster size and shape and on the substrate material and orientation. The experiments focus on iron and rhodium clusters on platinum and silver surfaces. We compare the properties of clusters deposited from the gas phase with clusters formed on the substrate by self-organization. The cluster structure, the electronic properties and the magnetism are studied with local and integral techniques, such as scanning tunneling microscopy, scanning tunneling spectroscopy and X-ray magnetic circular dichroism. The influence of the metallic substrate on the properties of the clusters will be studied by using epitaxial magnesium oxide spacer layers on Ag(100).