论文标题
可能对MO6SE6纳米线的纯粹一维电荷顺序的Phason-Polaron效应
Possible phason-polaron effect on purely one dimensional charge order of Mo6Se6 nanowires
论文作者
论文摘要
在一维金属系统中，分化的电子敏感性和电子音波耦合会协作将电子驱动到电荷密度波（CDW）状态。但是，严格的1D系统对扰动是不稳定的，其对CDW顺序的影响需要理想地澄清，并且与周围环境的耦合改变。在这里，我们通过纳米束束的纳米线制造了这样的系统，它们要么连接到单层Mose2的边缘，要么通过解雇后的Mose2，或者自由隔离。使用扫描隧道显微镜（STM），我们可视化电荷调制和CDW间隙，在边缘连接的纳米线中具有突出的相干峰。令人惊讶的是，CDW顺序在分离的纳米线中被抑制，显示了CDW相关间隙而没有相干峰。理论建模所揭示的对比行为被解释为Phason-Polaron对1D CDW状态的影响。我们的工作阐明了可能严格对1D系统通用的许多身体效应，但在准1D系统中受到破坏。
In one-dimensional (1D) metallic systems, the diverging electron susceptibility and electron-phonon coupling collaboratively drive the electrons into a charge density wave (CDW) state. However, strictly 1D system is unstable against perturbations, whose effect on CDW order requires clarification ideally with altered coupling to surroundings. Here, we fabricate such a system with nanowires of Mo6Se6 bundles, which are either attached to edges of monolayer MoSe2 or isolated freely, by post-annealing the preformed MoSe2. Using scanning tunneling microscopy (STM), we visualized charge modulations and CDW gaps with prominent coherent peaks in the edge-attached nanowires. Astonishingly, the CDW order becomes suppressed in the isolated nanowires, showing CDW correlation gaps without coherent peaks. The contrasting behavior, as revealed with theoretical modeling, is interpreted as the effect of phason-polarons on the 1D CDW state. Our work elucidates a possibly unprecedented many body effect that may be generic to strictly 1D system but undermined in quasi-1D system.
