Fabrizio Cossu, Krisztián Palotás, Sagar Sarkar, Igor Di Marco, Alireza Akbari NPG Asia Materials 12, 24 (2020) https://doi.org/10.1038/s41427-020-0207-x Abstract Charge density waves are ubiquitous phenomena in metallic transition metal dichalcogenides. In NbSe_2, a triangular 3 × 3 structural modulation is coupled to a charge modulation. Recent experiments reported evidence for a triangular-stripe transition at the surface, due to strain or accidental doping and associated