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: | |
Data di pubblicazione: | 2016 |
Volume: | 94 |
Fascicolo: | 12 |
Pagina iniziale: | 1 |
Pagina finale: | 5 |
Numero di Articolo: | 121102 |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevB.94.121102 |
URL: | https://arxiv.org/abs/1605.08865 http://cdsads.u-strasbg.fr/abs/2016PhRvB..94l1102W |
Appare nelle tipologie: | 1.1 Journal article |
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