Distant-Neighbor Hopping in Graphene and Haldane Models
STICLET, Doru
Laboratoire de Physique des Solides [LPS]
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Max-Planck-Institut für Physik komplexer Systeme [MPI-PKS]
Laboratoire de Physique des Solides [LPS]
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Max-Planck-Institut für Physik komplexer Systeme [MPI-PKS]
STICLET, Doru
Laboratoire de Physique des Solides [LPS]
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Max-Planck-Institut für Physik komplexer Systeme [MPI-PKS]
< Leer menos
Laboratoire de Physique des Solides [LPS]
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Max-Planck-Institut für Physik komplexer Systeme [MPI-PKS]
Idioma
en
Article de revue
Este ítem está publicado en
Physical Review B: Condensed Matter and Materials Physics (1998-2015). 2013, vol. 87, n° 11, p. 115402 (1-11)
American Physical Society
Resumen en inglés
Large Chern number phases in a Haldane model become possible if there is a multiplication of Dirac points in the underlying graphene model. This is realized by considering long-distance hopping integrals. Through variation ...Leer más >
Large Chern number phases in a Haldane model become possible if there is a multiplication of Dirac points in the underlying graphene model. This is realized by considering long-distance hopping integrals. Through variation of these integrals, it is possible to arrive at supermerging band touchings, which up to N7 graphene are unique in parameter space. They result from the synchronized motion of all supplementary Dirac points into the regular +/-K points of graphene. The energy dispersion power law is usually larger than the topological charge associated with them. Moreover, adding distant-neighbor hoppings in the Haldane mass allows one to sweep large Chern number phases in the topological insulator.< Leer menos
Palabras clave en inglés
Quantum phase transitions
Electronic structure of graphene
Electron states at surfaces and interfaces
Phases: geometric - dynamic or topological
Proyecto ANR
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Orígen
Importado de HalCentros de investigación