Artículo
Subbands in the doped two-orbital Kanamori-Hubbard model
Fecha de publicación:
12/2020
Editorial:
American Physical Society
Revista:
Physical Review B
ISSN:
2469-9969
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We calculate and resolve with unprecedented detail the local density of states (DOS) and momentum-dependent spectral functions at zero temperature of one of the key models for strongly correlated electron materials, the degenerate two-orbital Kanamori-Hubbard model, by means of the dynamical mean-field theory, which uses the density matrix renormalization group as the impurity solver. When the system is hole doped and in the presence of a finite interorbital Coulomb interaction, we find the emergence of a novel holon-doublon in-gap subband which is split by the Hund's coupling. We also observe interesting features in the DOS, such as the splitting of the lower Hubbard band into a coherent narrowly dispersing peak around the Fermi energy, and another subband which evolves with the chemical potential. We characterize the main transitions giving rise to each subband by calculating the response functions of specific projected operators and by comparing with the energies in the atomic limit. The detailed results for the spectral functions found in this work pave the way to study with great precision the microscopic quantum behavior in correlated materials.
Palabras clave:
simulaciones numericas
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Colecciones
Articulos (UE-INN - NODO BARILOCHE)
Articulos de UNIDAD EJECUTORA INSTITUTO DE NANOCIENCIA Y NANOTECNOLOGIA - NODO BARILOCHE
Articulos de UNIDAD EJECUTORA INSTITUTO DE NANOCIENCIA Y NANOTECNOLOGIA - NODO BARILOCHE
Citación
Hallberg, Karen Astrid; Núñez Fernández, Yuriel; Subbands in the doped two-orbital Kanamori-Hubbard model; American Physical Society; Physical Review B; 102; 24; 12-2020; 1-5
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