Crystals have enthralled humans for thousands of years with their visual beauty and elegant symmetrical shapes, and, more recently, with their numerous technological applications. Fundamentally, these materials are based on a highly regular arrangement of their smallest constituent elements, and the physical properties of crystalline materials depend strongly on the purity of their underlying lattice.
Click here for original story, Spiral dislocation gives 3D topological photonics a robust edge
Source: Phys.org