Pinball liquid phase from Hund's coupling in frustrated transition-metal oxides
The interplay of nonlocal Coulomb repulsion and Hund’s coupling in the d-orbital manifold in frustrated triangular lattices is analyzed by a multiband extended Hubbard model.We find a rich phase diagram with several competing phases, including a robust pinball liquid phase, which is an unconventiona...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2015 |
| País: | España |
| Institución: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/672897 |
| Acceso en línea: | http://hdl.handle.net/10486/672897 https://dx.doi.org/10.1103/PhysRevB.91.165139 |
| Access Level: | acceso abierto |
| Palabra clave: | Hund’s coupling Hubbard model Robust pinball Transition-metal oxides Física |
| Sumario: | The interplay of nonlocal Coulomb repulsion and Hund’s coupling in the d-orbital manifold in frustrated triangular lattices is analyzed by a multiband extended Hubbard model.We find a rich phase diagram with several competing phases, including a robust pinball liquid phase, which is an unconventional metal characterized by threefold charge order, bad metallic behavior, and the emergence of high-spin local moments. Our results naturally explain the anomalous charge-ordered metallic state observed in the triangular layered compound AgNiO2. The potential relevance to other triangular transition-metal oxides is discussed |
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