Noncollinear magnetic phases and edge states in graphene quantum Hall bars

J. L. Lado*, J. Fernández-Rossier

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

22 Sitaatiot (Scopus)

Abstrakti

Application of a perpendicular magnetic field to charge neutral graphene is expected to result in a variety of broken symmetry phases, including antiferromagnetic, canted, and ferromagnetic. All these phases open a gap in bulk but have very different edge states and noncollinear spin order, recently confirmed experimentally. Here we provide an integrated description of both edge and bulk for the various magnetic phases of graphene Hall bars making use of a noncollinear mean field Hubbard model. Our calculations show that, at the edges, the three types of magnetic order are either enhanced (zigzag) or suppressed (armchair). Interestingly, we find that preformed local moments in zigzag edges interact with the quantum spin Hall like edge states of the ferromagnetic phase and can induce backscattering.

AlkuperäiskieliEnglanti
Artikkeli165429
JulkaisuPhysical Review B - Condensed Matter and Materials Physics
Vuosikerta90
Numero16
DOI - pysyväislinkit
TilaJulkaistu - 21 lokakuuta 2014
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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