Strong and fragile topological Dirac semimetals with higher-order Fermi arcs

• Published in: Nature communications Vol. 11; no. 1; pp. 627 - 13
• Main Authors: Wieder, Benjamin J., Wang, Zhijun, Cano, Jennifer, Dai, Xi, Schoop, Leslie M., Bradlyn, Barry, Bernevig, B. Andrei
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 31.01.2020; Nature Publishing Group; Nature Portfolio
• Subjects: 639/301/119/995; 639/766/119/2792/4128; Condensed matter physics; Eigenvalues; Fermions; Humanities and Social Sciences; Metalloids; multidisciplinary; Physics; Quadrupoles; Questions; Science; Science & Technology - Other Topics; Science (multidisciplinary); Solid state; Symmetry; Topology

Dirac and Weyl semimetals both exhibit arc-like surface states. However, whereas the surface Fermi arcs in Weyl semimetals are topological consequences of the Weyl points themselves, the surface Fermi arcs in Dirac semimetals are not directly related to the bulk Dirac points, raising the question of...