We study the combined effects of lattice deformation, e−e interaction, and spin-orbit coupling in a two-dimensional (2D) honeycomb lattice. We adopt different kinds of hopping modulation—generalized dimerization and a Kekulé distortion—and calculate topological invariants for the noninteracting system and for the interacting system. We identify the parameter range (Hubbard U, hopping modulation, spin-orbit coupling) where the 2D system behaves as a trivial insulator or quantum spin Hall insulator.
Topological properties of the bond-modulated honeycomb lattice / Grandi, F.; Manghi, Franca; Corradini, Olindo; Bertoni, Carlo Maria. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 91:11(2015), pp. 1-7. [10.1103/PhysRevB.91.115112]
Topological properties of the bond-modulated honeycomb lattice
MANGHI, Franca;CORRADINI, Olindo;BERTONI, Carlo Maria
2015
Abstract
We study the combined effects of lattice deformation, e−e interaction, and spin-orbit coupling in a two-dimensional (2D) honeycomb lattice. We adopt different kinds of hopping modulation—generalized dimerization and a Kekulé distortion—and calculate topological invariants for the noninteracting system and for the interacting system. We identify the parameter range (Hubbard U, hopping modulation, spin-orbit coupling) where the 2D system behaves as a trivial insulator or quantum spin Hall insulator.
| File | Dimensione | Formato | |
|---|---|---|---|
|
ManghiTopologicalPhysRevB.91.115112.pdf
Accesso riservato
Tipologia:
Versione pubblicata dall'editore
Dimensione
951.42 kB
Formato
Adobe PDF
|
951.42 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
Pubblicazioni consigliate
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris
