论文标题
用X射线吸收光谱测量的轨道分辨单原子磁化
Orbital-resolved single atom magnetism measured with X-ray absorption spectroscopy
论文作者
论文摘要
由于其电子量子状态的磁性寿命很长，因此灯笼原子和分子是原子数据存储和量子逻辑的有前途的候选者。通过电气传输访问这些状态，需要将其电子构型的工程降低到单个原子轨道的水平。在这里，我们使用X射线吸收光谱和磁性圆形二色性，解决了表面支撑的灯笼原子，簇和具有轨道选择性的膜的磁性。我们利用电偶极转变的选择规则来揭示在MGO/AG上沉积的GD和HO价电子的占用和磁性（100）。将我们的结果与多重计算和密度功能理论进行比较，我们确定了一种电荷转移机制，该机制将灯笼物种留在非常规的单电离构型中。我们的方法允许确定价电子在基于灯笼的纳米结构的量子水平结构中的作用。
Lanthanide atoms and molecules are promising candidates for atomic data storage and quantum logic due to the long magnetic lifetime of their electron quantum states. Accessing these states through electrical transport requires the engineering of their electronic configuration down to the level of individual atomic orbitals. Here, we address the magnetism of surface-supported lanthanide atoms, clusters, and films with orbital selectivity using X-ray absorption spectroscopy and magnetic circular dichroism. We exploit the selection rules of electric dipole transitions to reveal the occupation and magnetism of the valence electrons of Gd and Ho deposited on MgO/Ag(100). Comparing our results with multiplet calculations and density functional theory, we identify a charge transfer mechanism that leaves the lanthanide species in an unconventional singly ionized configuration. Our approach allows determining the role of valence electrons on the quantum level structure of lanthanide-based nanostructures.
