Observation of surface superstructure induced by systematic vacancies in the topological Dirac semimetal Cd${}_3$As${}_2$

Christopher J. Butler, Yi Tseng, Cheng-Rong Hsing +6

The Dirac semimetal phase found in Cd${}_3$As${}_2$ is protected by a $C_4$ rotational symmetry derived from a corkscrew arrangement of systematic Cd vacancies in its complicated…