Topological states in multi-orbital HgTe ...
Type de document :
Compte-rendu et recension critique d'ouvrage
DOI :
Titre :
Topological states in multi-orbital HgTe honeycomb lattices
Auteur(s) :
Beugeling, W. [Auteur]
Max Planck Institute for Physics
Kalesaki, E. [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Delerue, Christophe [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Niquet, Yann-Michel [Auteur]
Nanostructures et Magnétisme [NM]
Vanmaekelbergh, D. [Auteur]
Debye Institute for Nanomaterials Science
Smith, C. Morais [Auteur]
Institute for Theoretical Physics [Utrecht]
Max Planck Institute for Physics
Kalesaki, E. [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Delerue, Christophe [Auteur]
![refId](/themes/Mirage2//images/idref.png)
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Niquet, Yann-Michel [Auteur]
Nanostructures et Magnétisme [NM]
Vanmaekelbergh, D. [Auteur]
Debye Institute for Nanomaterials Science
Smith, C. Morais [Auteur]
Institute for Theoretical Physics [Utrecht]
Titre de la revue :
Nature Communications
Pagination :
6316
Éditeur :
Nature Publishing Group
Date de publication :
2015-03-10
ISSN :
2041-1723
Mot(s)-clé(s) en anglais :
Massless Dirac Fermions
Quantum-Wells
Graphene
Nanostructures
Superlattices
Insulators
Transition
Attachment
Silicon
Gas
Quantum-Wells
Graphene
Nanostructures
Superlattices
Insulators
Transition
Attachment
Silicon
Gas
Discipline(s) HAL :
Physique [physics]
Résumé en anglais : [en]
Research on graphene has revealed remarkable phenomena arising in the honeycomb lattice. However, the quantum spin Hall effect predicted at the K point could not be observed in graphene and other honeycomb structures of ...
Lire la suite >Research on graphene has revealed remarkable phenomena arising in the honeycomb lattice. However, the quantum spin Hall effect predicted at the K point could not be observed in graphene and other honeycomb structures of light elements due to an insufficiently strong spin-orbit coupling. Here we show theoretically that 2D honeycomb lattices of HgTe can combine the effects of the honeycomb geometry and strong spin-orbit coupling. The conduction bands, experimentally accessible via doping, can be described by a tight-binding lattice model as in graphene, but including multi-orbital degrees of freedom and spin-orbit coupling. This results in very large topological gaps (up to 35 meV) and a flattened band detached from the others. Owing to this flat band and the sizable Coulomb interaction, honeycomb structures of HgTe constitute a promising platform for the observation of a fractional Chern insulator or a fractional quantum spin Hall phase.Lire moins >
Lire la suite >Research on graphene has revealed remarkable phenomena arising in the honeycomb lattice. However, the quantum spin Hall effect predicted at the K point could not be observed in graphene and other honeycomb structures of light elements due to an insufficiently strong spin-orbit coupling. Here we show theoretically that 2D honeycomb lattices of HgTe can combine the effects of the honeycomb geometry and strong spin-orbit coupling. The conduction bands, experimentally accessible via doping, can be described by a tight-binding lattice model as in graphene, but including multi-orbital degrees of freedom and spin-orbit coupling. This results in very large topological gaps (up to 35 meV) and a flattened band detached from the others. Owing to this flat band and the sizable Coulomb interaction, honeycomb structures of HgTe constitute a promising platform for the observation of a fractional Chern insulator or a fractional quantum spin Hall phase.Lire moins >
Langue :
Anglais
Vulgarisation :
Non
Projet ANR :
Source :
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- https://www.nature.com/articles/ncomms7316.pdf
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- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4366513/pdf
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- https://hal.archives-ouvertes.fr/hal-01587149/document
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- ncomms7316.pdf
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