We discuss the conversion of a pure screw dislocation into a helical (single helix) dislocation through absorption of vacancies. These helical dislocations having some edge and mostly screw character can pair up through attractive interaction to form a double helix. This attractive interaction between two helices is derived through the edge component of mixed dislocations and from the presence of vacancy jogs. Recent results on the growth of GeS [1] and PbS [3] nanowires with Eshelby twist showed large disagreements between experimental and theoretical Burgers vectors for these crystal structures, which can be resolved by introducing the double helix of screw dislocations.

我们讨论了通过吸收空位将纯螺旋位错转化为螺旋（单螺旋）位错。这些具有一些边缘和主要螺旋特征的螺旋位错可以通过吸引力相互作用配对以形成双螺旋。两个螺旋之间的这种有吸引力的相互作用是通过混合位错的边缘分量和空位转折的存在得出的。最近关于具有 Eshelby 扭曲的 GeS [ 1 ] 和 PbS [ 3 ] 纳米线生长的结果表明，这些晶体结构的实验和理论 Burgers 向量之间存在很大差异，这可以通过引入螺旋位错的双螺旋来解决。