Topological insulating phases from two-dimensional nodal loop semimetals

Article

关键词: WEYL FERMION SEMIMETAL;    DIRAC SEMIMETAL;    LATTICE;    DISCOVERY;   

DOI  :  10.1103/PhysRevB.94.165117

来源: SCIE

【 摘 要 】

Starting from a minimal model for a two-dimensional nodal loop semimetal, we study the effect of chiral mass gap terms. The resulting Dirac loop anomalous Hall insulator's Chern number is the phase-winding number of the mass gap terms on the loop. We provide simple lattice models, analyze the topological phases, and generalize a previous index characterizing topological transitions. The responses of the Dirac loop anomalous Hall and quantum spin Hall insulators to a magnetic field's vector potential are also studied both in weak-and strong-field regimes, as well as the edge states in a ribbon geometry.

【 授权许可】

Free