论文标题
一维Moiré超级晶格和倒塌的手性碳纳米管中的扁平带
One-dimensional moiré superlattices and flat bands in collapsed chiral carbon nanotubes
论文作者
论文摘要
我们证明，类似于在扭曲的双层石墨烯中的莫伊尔模式，可以在折叠的手性碳纳米管中出现。诉诸方法的组合，即分子动力学，以获得针对从头算建模验证的松弛几何形状和紧密结合计算，我们发现魔术角物理学发生在倒塌的碳纳米管中。揭示了Moiré角度下降的AA区域的速度降低，平面带和定位，显示了一个接近1 $^{\ rm O} $的魔术角。从AA区域的空间扩展和平坦带的宽度，我们估计这些系统中的多体相互作用比扭曲的双层石墨烯中强。手性折叠的碳纳米管是探索低维度的多体效应和超导性的有前途的候选者，作为扭曲的双层石墨烯的一维类似物出现。
We demonstrate that one-dimensional moiré patterns, analogous to those found in twisted bilayer graphene, can arise in collapsed chiral carbon nanotubes. Resorting to a combination of approaches, namely, molecular dynamics to obtain the relaxed geometries and tight-binding calculations validated against ab initio modeling, we find that magic angle physics occur in collapsed carbon nanotubes. Velocity reduction, flat bands and localization in AA regions with diminishing moiré angle are revealed, showing a magic angle close to 1$^{\rm o}$. From the spatial extension of the AA regions and the width of the flat bands, we estimate that many-body interactions in these systems are stronger than in twisted bilayer graphene. Chiral collapsed carbon nanotubes stand out as promising candidates to explore many-body effects and superconductivity in low dimensions, emerging as the one-dimensional analogues of twisted bilayer graphene.
