Abstract Laser heating can be used to produce single crystal architectures in glass with a lattice that rotates at a constant rate. Such metamaterials can offer properties that are disallowed by conventional crystal structures. To establish the mechanism of this lattice rotation, we used transmission electron microscopy (TEM) to directly observe and characterize dislocations in Sb2S3 crystal lines fabricated in Sb-S-I glass as a model system. The lattice rotation calculated from the density and Burgers vectors of edge dislocations agrees with lattice rotation values experimentally determined by electron backscatter diffraction (EBSD) and selected area diffraction patterns (SADP). These results provide the first direct proof of the dislocation mechanism of lattice rotation in rotating lattice single (RLS) crystals, and very likely other forms of growth actuated bending, twisting and noncrystallographic branching as seen in spherulites.

中文翻译：

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旋转晶格单 (RLS) 晶体中晶格旋转的来源

摘要 激光加热可用于在玻璃中生产具有以恒定速率旋转的晶格的单晶结构。这种超材料可以提供传统晶体结构不允许的特性。为了建立这种晶格旋转的机制，我们使用透射电子显微镜 (TEM) 直接观察和表征在 Sb-SI 玻璃中制造的 Sb2S3 晶体线中的位错作为模型系统。从边缘位错的密度和伯格斯矢量计算的晶格旋转与通过电子背散射衍射 (EBSD) 和选区衍射图 (SADP) 实验确定的晶格旋转值一致。这些结果首次直接证明了旋转晶格单 (RLS) 晶体中晶格旋转的位错机制，