论文标题
可视化平面外电子分散液在插入式过渡金属二甲元中元素中
Visualizing the out-of-plane electronic dispersions in an intercalated transition metal dichalcogenide
论文作者
论文摘要
分层的过渡金属二分法具有丰富的相图，并且在众多物理特性上具有二维。 CO1/3NBS2是该家族中最新的成员之一，其中CO原子被插入NBS2层之间的范德华差距。我们使用表面和大量敏感角度分辨光发射光谱研究CO1/3NBS2的三维电子带结构。我们表明，在CO插入后，电子带不适合刚性换档。取而代之的是，与原始的NBS2化合物相比，CO1/3NBS2在费米水平附近显示出不同的轨道特征，尽管具有分层结构，但在Kz方向上具有透明的谱带分散。我们的光发作研究表明，CO插入引入的平面外电子相关性，从而为该化合物提供了新的视角。最后，我们提出了费米水平的调整如何导致外来的相位，例如旋转密度波不稳定性。
Layered transition metal dichalcogenides have rich phase diagram and they feature two dimensionality on numerous physical properties. Co1/3NbS2 is one of the newest members of this family where Co atoms are intercalated into the Van der Waals gaps between NbS2 layers. We study the three-dimensional electronic band structure of Co1/3NbS2 using both surface and bulk sensitive angle-resolved photoemission spectroscopy. We show that the electronic bands do not fit into the rigid-band-shift picture after the Co intercalation. Instead, Co1/3NbS2 displays a different orbital character near the Fermi level compared to the pristine NbS2 compound and has a clear band dispersion in kz direction despite its layered structure. Our photoemission study demonstrates the out-of-plane electronic correlations introduced by the Co intercalation, thus offering a new perspective on this compound. Finally, we propose how Fermi level tuning could lead to exotic phases such as spin density wave instability.
