论文标题
准二维电荷密度波中的二维手性堆叠顺序
Two-dimensional chiral stacking orders in quasi-one-dimensional charge density waves
论文作者
论文摘要
手性在自然界中以各种形式表现出来。但是，没有证据表明一维电荷密度波（CDW）系统中的手性。在这里，我们借助扫描隧道显微镜，对称性分析和密度功能理论计算探索了准二维CDW接地状态之间的手性。我们发现了三种不同的手性，以二维性手性堆叠顺序形式出现，由简并CDW接地状态组成：右，左和非手动堆叠顺序。这种手性堆叠订单对应于新引入的手性绕组数字。此外，我们观察到这些手性堆叠顺序与手性涡流和手性域壁交织在一起，这在工程性手性堆叠顺序中起着至关重要的作用。我们的发现表明，意想不到的手性堆叠顺序可以打开一种研究CDW系统中的手性的方法，这可能导致各种现象，例如圆形二色症，具体取决于手性。
Chirality manifests in various forms in nature. However, there is no evidence of the chirality in one-dimensional charge density wave (CDW) systems. Here, we have explored the chirality among quasi-one-dimensional CDW ground states with the aid of scanning tunneling microscopy, symmetry analysis, and density functional theory calculations. We discovered three distinct chiralities emerging in the form of two-dimensional chiral stacking orders composed of degenerate CDW ground states: right-, left-, and nonchiral stacking orders. Such chiral stacking orders correspond to newly introduced chiral winding numbers. Furthermore, we observed that these chiral stacking orders are intertwined with chiral vortices and chiral domain walls, which play a crucial role in engineering the chiral stacking orders. Our findings suggest that the unexpected chiral stacking orders can open a way to investigate the chirality in CDW systems, which can lead to diverse phenomena such as circular dichroism depending on chirality.
