We show that the inclusion of nonlocal correlation effects in a variational wave function for the ground state of a topological Anderson lattice Hamiltonian is capable of describing both topologically trivial insulating phases and nontrivial ones characterized by an indirect gap, as well as its closure at the transition into a metallic phase. The method, though applied to an oversimplified model, thus captures the metallic and insulating states that are indeed observed in a variety of Kondo semiconductors, while accounting for topologically nontrivial band structures. © 2016 American Physical Society.
|Titolo:||Many-body breakdown of indirect gap in topological Kondo insulators|
|Autori:||Wysokiński, M. M.; Fabrizio, M.|
|Rivista:||PHYSICAL REVIEW. B|
|Data di pubblicazione:||2016|
|Digital Object Identifier (DOI):||10.1103/PhysRevB.94.121102|
|Appare nelle tipologie:||1.1 Journal article|