Topological Anderson insulating phases in the interacting Haldane model
We analyze the influence of disorder and strong correlations on the topology of two-dimensional Chern insulators. A mean-field calculation in the half-filled Haldane model with extended Hubbard interactions and Anderson disorder shows that the disorder favors topology in the interacting case and ext...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/393477 |
| Acceso en línea: | http://hdl.handle.net/10261/393477 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85188837121&doi=10.1103%2fPhysRevB.109.125145&partnerID=40&md5=da3130a3f3301e335643e3d36e21a27e |
| Access Level: | acceso abierto |
| Palabra clave: | Phase diagrams Phase transitions Topological materials Hubbard model Lattice models in condensed matter Mean field theory |
| Sumario: | We analyze the influence of disorder and strong correlations on the topology of two-dimensional Chern insulators. A mean-field calculation in the half-filled Haldane model with extended Hubbard interactions and Anderson disorder shows that the disorder favors topology in the interacting case and extends the topological phase to a larger region of the Hubbard parameters. In the absence of a staggered potential, we find a novel disorder-driven topological phase with Chern number C=1, with the coexistence of topology with long-range spin and charge orders. More conventional topological Anderson insulating phases are also found in the presence of a finite staggered potential. © 2024 American Physical Society. |
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