Sessi, Paolo Robust spin-polarized midgap states at step edges of topological crystalline insulators. [electronic resource] - Science (New York, N.Y.) 12 2016 - 1269-1273 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 1095-9203 Standard No.: 10.1126/science.aah6233 doi