论文标题
nbse $ _3 $中充电密度波的空间排序
Spatial ordering of the charge density waves in NbSe$_3$
论文作者
论文摘要
订购两个不一致的电荷密度波（CDW），$ \ MATHBF {q_1} $ =（0.0，0.243，0.0）和$ \ \ \ \ \ \ \ \ \ \ \ \ \ \ {q_2} $ =（0.5，0.5，0.263,0.5）在quasi-ne-ne-ne-ne-ne-dimension nbse $ _3 $ _3 $结构中均可扫描。使用三维傅立叶变换沿三种类型的三角形棱镜柱进行分析，较大（100）范德华表面，平行于单斜$ \ mathbf {b_0} $方向平行运行。该过程实现了两个CDW调制单个列之间的明确区分。此外，它允许对同一类型的不同列的调制幅度进行定量比较，并且在足够大的图像的情况下，也沿单个列列。可以证实，每个CDW都会调节具有最狭窄的同步碱基的III和类型I列。因此，在两个略有不同的模式之间观察到跳动。桥接类型II列似乎没有调制。大规模的调制幅度沿单个色谱柱变化，表明形成CDW纳米域。沿形成对称相关的对的列互换两个CDW的可能性会导致电荷差，这可能是CDW滑动的可能起源。
Ordering of the two incommensurate charge density waves (CDW), $\mathbf{q_1}$ = (0.0, 0.243, 0.0) and $\mathbf{q_2}$ = (0.5, 0.263,0.5) in the quasi-one-dimensional NbSe$_3$ structure is studied by means of low temperature scanning tunneling microscopy. Larger (100) van der Waals surfaces are analyzed using one-dimensional Fourier transforms along the three types of trigonal prismatic columns, running parallel to the monoclinic $\mathbf{b_0}$ direction. The procedure enables unambiguous differentiation between both CDWs modulating individual columns. In addition, it allows a quantitative comparison of modulation amplitudes along different columns of the same type and, in case of sufficiently large images, also along individual columns. It is confirmed that each CDW modulates both type-III and type-I columns with the narrowest isosceles bases. As a consequence beating is observed between the two slightly different modes. The bridging type-II columns appear not to be modulated. On a large scale the modulation amplitudes along individual columns vary, suggesting formation of CDW nanodomains. The possibility of interchanging both CDWs along columns forming symmetry-related pairs results in a charge difference, which might be the possible origin of CDW sliding.
