When Cubic Is Not Isotropic: Phonon-Exciton Decoupling in CuInSnS${}_4$ Single Crystals

Lara Kim Linke, Yvonne Tomm, Xinyun Liu +9

Atomic-scale disorder can create hidden optical anisotropy even in crystals that are structurally cubic on average. Here, we show that CuInSnS${}_4$ single crystals host locally symm…