We investigate the emergence of antiferromagnetic ordering and its effect on the helical edge states in a quantum spin Hall insulator, in the presence of strong Coulomb interaction. Using dynamical mean-field theory, we show that the breakdown of lattice translational symmetry favors the formation of magnetic ordering with nontrivial spatial modulation. The onset of a nonuniform magnetization enables the coexistence of spin-ordered and topologically nontrivial states. An unambiguous signature of the persistence of the topological bulk property is the survival of bona fide edge states. We show that the penetration of the magnetic order is accompanied by the progressive reconstruction of gapless states in subperipheral layers, redefining the actual topological boundary within the system.

Coexistence of metallic edge states and antiferromagnetic ordering in correlated topological insulators / Amaricci, A.; Valli, A.; Sangiovanni, G.; Trauzettel, B.; Capone, M.. - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - 98:4(2018), pp. 1-6. [10.1103/PhysRevB.98.045133]

Coexistence of metallic edge states and antiferromagnetic ordering in correlated topological insulators

Amaricci, A.;Valli, A.;Sangiovanni, G.;Capone, M.
2018

Abstract

We investigate the emergence of antiferromagnetic ordering and its effect on the helical edge states in a quantum spin Hall insulator, in the presence of strong Coulomb interaction. Using dynamical mean-field theory, we show that the breakdown of lattice translational symmetry favors the formation of magnetic ordering with nontrivial spatial modulation. The onset of a nonuniform magnetization enables the coexistence of spin-ordered and topologically nontrivial states. An unambiguous signature of the persistence of the topological bulk property is the survival of bona fide edge states. We show that the penetration of the magnetic order is accompanied by the progressive reconstruction of gapless states in subperipheral layers, redefining the actual topological boundary within the system.
98
4
1
6
045133
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.98.045133
https://arxiv.org/abs/1805.03999
Amaricci, A.; Valli, A.; Sangiovanni, G.; Trauzettel, B.; Capone, M.
File in questo prodotto:
File Dimensione Formato  
PhysRevB.98.045133.pdf

non disponibili

Tipologia: Versione Editoriale (PDF)
Licenza: Non specificato
Dimensione 1.32 MB
Formato Adobe PDF
1.32 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
1805.03999.pdf

accesso aperto

Tipologia: Documento in Pre-print
Licenza: Non specificato
Dimensione 1.81 MB
Formato Adobe PDF
1.81 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/88208
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 11
  • ???jsp.display-item.citation.isi??? 11
social impact