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Topological confinement in an antisymmetric potential in bilayer graphene in the presence of a magnetic field.

Zarenia M, Pereira JM, Peeters FM, de Aquino Farias G - Nanoscale Res Lett (2011)

Bottom Line: We investigate the effect of an external magnetic field on the carrier states that are localized at a potential kink and a kink-antikink in bilayer graphene.These chiral states are localized at the interface between two potential regions with opposite signs.PACS numbers: 71.10.Pm, 73.21.-b, 81.05.Uw.

View Article: PubMed Central - HTML - PubMed

Affiliation: Departamento de Física, Universidade Federal do Ceará, Fortaleza, Ceará, 60455-760, Brazil. pereira@fisica.ufc.br.

ABSTRACT
We investigate the effect of an external magnetic field on the carrier states that are localized at a potential kink and a kink-antikink in bilayer graphene. These chiral states are localized at the interface between two potential regions with opposite signs.PACS numbers: 71.10.Pm, 73.21.-b, 81.05.Uw.

No MeSH data available.


(Color online) Schematic illustration of the bilayer graphene device for the creation of a kink potential. Applied gated voltage to the upper and lower layers with opposite sign induce a spacial dependent electric field Ee. An external magnetic field , is applied perpendicular to the bilayer graphene sheets.
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Figure 1: (Color online) Schematic illustration of the bilayer graphene device for the creation of a kink potential. Applied gated voltage to the upper and lower layers with opposite sign induce a spacial dependent electric field Ee. An external magnetic field , is applied perpendicular to the bilayer graphene sheets.

Mentions: An alternative way to create one dimensional localized states in BLG has recently been suggested by Martin et al.[9] and relies on the creation of a potential "kink" by an asymmetric potential profile (see Figure 1). It has been shown that localized chiral states arise at the location of the kink, with energies inside the energy gap. These states correspond to uni-directional motion of electrons which are analogous to the edge states in a quantum Hall system and show a valley-dependent propagation along the kink. From a practical standpoint, the kinks may be envisaged as configurable metallic nanowires embedded in a semiconductor medium. Moreover, the carrier states in this system are expected to be robust with regards to scattering and may display Luttinger liquid behavior[10]. Such kink potentials can be realized in e.g. p-n junctions. Recently the transport properties of p-n-p junctions in bilayer graphene were investigated experimentally in the presence of a perpendicular magnetic field[11].


Topological confinement in an antisymmetric potential in bilayer graphene in the presence of a magnetic field.

Zarenia M, Pereira JM, Peeters FM, de Aquino Farias G - Nanoscale Res Lett (2011)

(Color online) Schematic illustration of the bilayer graphene device for the creation of a kink potential. Applied gated voltage to the upper and lower layers with opposite sign induce a spacial dependent electric field Ee. An external magnetic field , is applied perpendicular to the bilayer graphene sheets.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211872&req=5

Figure 1: (Color online) Schematic illustration of the bilayer graphene device for the creation of a kink potential. Applied gated voltage to the upper and lower layers with opposite sign induce a spacial dependent electric field Ee. An external magnetic field , is applied perpendicular to the bilayer graphene sheets.
Mentions: An alternative way to create one dimensional localized states in BLG has recently been suggested by Martin et al.[9] and relies on the creation of a potential "kink" by an asymmetric potential profile (see Figure 1). It has been shown that localized chiral states arise at the location of the kink, with energies inside the energy gap. These states correspond to uni-directional motion of electrons which are analogous to the edge states in a quantum Hall system and show a valley-dependent propagation along the kink. From a practical standpoint, the kinks may be envisaged as configurable metallic nanowires embedded in a semiconductor medium. Moreover, the carrier states in this system are expected to be robust with regards to scattering and may display Luttinger liquid behavior[10]. Such kink potentials can be realized in e.g. p-n junctions. Recently the transport properties of p-n-p junctions in bilayer graphene were investigated experimentally in the presence of a perpendicular magnetic field[11].

Bottom Line: We investigate the effect of an external magnetic field on the carrier states that are localized at a potential kink and a kink-antikink in bilayer graphene.These chiral states are localized at the interface between two potential regions with opposite signs.PACS numbers: 71.10.Pm, 73.21.-b, 81.05.Uw.

View Article: PubMed Central - HTML - PubMed

Affiliation: Departamento de Física, Universidade Federal do Ceará, Fortaleza, Ceará, 60455-760, Brazil. pereira@fisica.ufc.br.

ABSTRACT
We investigate the effect of an external magnetic field on the carrier states that are localized at a potential kink and a kink-antikink in bilayer graphene. These chiral states are localized at the interface between two potential regions with opposite signs.PACS numbers: 71.10.Pm, 73.21.-b, 81.05.Uw.

No MeSH data available.