Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA.
Phys Rev Lett. 2010 Sep 3;105(10):106601. doi: 10.1103/PhysRevLett.105.106601.
An extensive redistribution of spin density in TBrPP-Co molecules adsorbed on a Cu(111) surface is investigated by monitoring Kondo resonances at different locations on single molecules. Remarkably, the width of the Kondo resonance is found to be much larger on the organic ligands than on the central cobalt atom-reflecting enhanced spin-electron interactions on molecular orbitals. This unusual effect is explained by means of first-principles and numerical renormalization-group calculations highlighting the possibility to engineer spin polarization by exploiting interfacial charge transfer.
通过在单个分子的不同位置监测近藤共振，研究了吸附在 Cu(111)表面的 TBrPP-Co 分子中自旋密度的广泛重新分布。值得注意的是，在有机配体上的近藤共振的宽度比在中心钴原子上的要大得多——这反映了分子轨道上增强的自旋-电子相互作用。这种异常效应通过第一性原理和数值重整化群计算得到了解释，突出了通过利用界面电荷转移来设计自旋极化的可能性。
