论文标题
新的Kondo系统SMO薄膜的硬和软X射线光发射光谱研究
Hard and soft x-ray photoemission spectroscopy study of the new Kondo system SmO thin film
论文作者
论文摘要
SMO薄膜是一种新的近野系统，显示了10 K左右的电阻率上升，理论上提议具有拓扑的非平凡带结构。我们已经执行了硬X射线和软X射线光发射光谱，以阐明SMO的电子结构。从SM 3 $ d $核心级别的光谱中，我们估计SM的价为$ \ sim $ 2.96，证明SM的价值混合价。 Valence-Band光发射光谱显示出源自SM 5 $ d $衍生的乐队的清晰的费米边缘。目前的发现与表明SMO中可能拓扑状态的理论一致，并表明稀土一氧化物或它们的异质结构可以成为强大电子相关和自旋轨道耦合相互作用的新操场。
SmO thin film is a new Kondo system showing a resistivity upturn around 10 K and was theoretically proposed to have a topologically nontrivial band structure. We have performed hard x-ray and soft x-ray photoemission spectroscopy to elucidate the electronic structure of SmO. From the Sm 3$d$ core-level spectra, we have estimated the valence of Sm to be $\sim$2.96, proving that the Sm has a mixed valence. The valence-band photoemission spectra exhibit a clear Fermi edge originating from the Sm 5$d$-derived band. The present finding is consistent with the theory suggesting a possible topological state in SmO and show that rare-earth monoxides or their heterostructures can be a new playground for the interplay of strong electron correlation and spin-orbit coupling.
