Spin structures in transition metal oxide or chalgogenide chains

该项目的目的是制造新的一维（1D）磁结构，阐明其自旋结构和原子结构，并确定潜在的相互作用机制。 作为一类有前途的一维结构材料，我们专注于金属衬底上的过渡金属氧化物和过渡金属硫属化物。 这使我们不仅可以研究过渡金属离子及其电荷或自旋状态的性质的影响，而且还可以研究介导耦合的紧邻原子的化学性质的影响。 我们实现了这一点，通过一个独特的实验方法相结合，可以阐明的表面的结构特性，一方面和当地的磁秩序在真实的空间上的其他。 这将使我们能够研究磁有序现象对1D过渡金属氧化物和新制备的过渡金属硫属化物的化学计量比的依赖性，具有前所未有的精度。 特别是，我们感兴趣的条件下，共线或非共线自旋结构形成沿着链，但也垂直于他们。 相关的参数，这是系统地改变在这个项目中的选择，是TM离子的性质，其氧化数，基板的变化，从第16族的元素的结合伴侣的变化和基板的变化耦合的链结构之间的额外的吸附物。

The aim of this project is to fabricate novel one-dimensional (1D) magnetic structures, to elucidate their spin structure and atomic structure and to identify the underlying interaction mechanisms. As a promising class of materials for the 1D structures, we focus on transition metal oxides and transition metal chalcogenides on metal substrates. This allows us to investigate not only the influence of the nature of the transition metal ion and its charge or spin state, but also the influence of the chemistry of the immediate neighboring atoms that mediate the coupling. We achieve this by a unique combination of experimental methods that can elucidate the structural properties of the surface on the one hand and the local magnetic order in real space on the other. This will allow us to investigate the dependence of magnetic ordering phenomena on the stoichiometry of the 1D transition metal oxides and the newly prepared transition metal chalcogenides with unprecedented precision. In particular, we are interested in the conditions under which collinear or non-collinear spin structures are formed along the chains but also perpendicular to them. Relevant parameters, which are systematically varied in a selection in this project, are the nature of the TM ion, its oxidation number, the variation of the substrate, the variation of the binding partners from the elements of group 16 and the change of the substrate coupling by additional adsorbates between the chain structures.