论文标题
单层VTE2中的轨道合并电荷密度波
Orbital-collaborative Charge Density Wave in Monolayer VTe2
论文作者
论文摘要
过渡金属二分法中的电荷密度波已经与Mott绝缘体，电荷转移绝缘子和超导体密切相关。 VTE2单层最近由于其突出的电子相关性和CDW订单的神秘起源而出现了。作为多种电荷密度波的金属，它涉及复杂的电子电子和电子 - 光子相互作用。通过一项扫描隧道显微镜研究，我们观察到具有显着电荷和轨道分离的Triple-Q 4-BY-4和单Q 4 by-1调制。 Triple-Q 4 x-4顺序强烈源于p-d杂交状态，导致电荷分布与V-ATOM聚类模型一致。与较低的费米水平相关联，局部单Q 4 x电子图案是用剩余的4 x-4订购的p-d杂交状态生成的。在光谱研究中，在原子尺度上解决了轨道和原子选择性电荷密度波间隙，其大小高达〜400 MeV。
Charge density waves in transition metal dichalcogenides have been intensively studied for their close correlation with Mott insulator, charge-transfer insulator, and superconductor. VTe2 monolayer recently comes into sight because of its prominent electron correlations and the mysterious origin of CDW orders. As a metal of more than one type of charge density waves, it involves complicated electron-electron and electron-phonon interactions. Through a scanning tunneling microscopy study, we observed triple-Q 4-by-4 and single-Q 4-by-1 modulations with significant charge and orbital separation. The triple-Q 4-by-4 order arises strongly from the p-d hybridized states, resulting in a charge distribution in agreement with the V-atom clustering model. Associated with a lower Fermi level, the local single-Q 4-by-1 electronic pattern is generated with the p-d hybridized states remaining 4-by-4 ordered. In the spectroscopic study, orbital- and atomic- selective charge-density-wave gaps with the size up to ~400 meV were resolved on the atomic scale.
