Details
| Original language | English |
|---|---|
| Article number | 5742 |
| Journal | Nature Communications |
| Volume | 5 |
| Publication status | Published - 2014 |
Abstract
The electronic properties of bilayer graphene strongly depend on relative orientation of the two atomic lattices. Whereas Bernal-stacked graphene is most commonly studied, a rotational mismatch between layers opens up a whole new field of rich physics, especially at small interlayer twist. Here we report on magnetotransport measurements on twisted graphene bilayers, prepared by folding of single layers. These reveal a strong dependence on the twist angle, which can be estimated by means of sample geometry. At small rotation, superlattices with a wavelength in the order of 10 nm arise and are observed by friction atomic force microscopy. Magnetotransport measurements in this small-angle regime show the formation of satellite Landau fans. These are attributed to additional Dirac singularities in the band structure and discussed with respect to the wide range of interlayer coupling models.
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Biochemistry, Genetics and Molecular Biology(all)
- General Biochemistry,Genetics and Molecular Biology
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Nature Communications, Vol. 5, 5742, 2014.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Superlattice structures in twisted bilayers of folded graphene
AU - Schmidt, Hennrik
AU - Rode, Johannes C.
AU - Smirnov, Dmitri
AU - Haug, Rolf J.
N1 - Funding information: This work was supported by the DFG within the Priority Programme ‘Graphene’ and by the NTH School for Contacts in Nanosystems. J.C.R. acknowledges support from Hannover School for Nanotechnology.
PY - 2014
Y1 - 2014
N2 - The electronic properties of bilayer graphene strongly depend on relative orientation of the two atomic lattices. Whereas Bernal-stacked graphene is most commonly studied, a rotational mismatch between layers opens up a whole new field of rich physics, especially at small interlayer twist. Here we report on magnetotransport measurements on twisted graphene bilayers, prepared by folding of single layers. These reveal a strong dependence on the twist angle, which can be estimated by means of sample geometry. At small rotation, superlattices with a wavelength in the order of 10 nm arise and are observed by friction atomic force microscopy. Magnetotransport measurements in this small-angle regime show the formation of satellite Landau fans. These are attributed to additional Dirac singularities in the band structure and discussed with respect to the wide range of interlayer coupling models.
AB - The electronic properties of bilayer graphene strongly depend on relative orientation of the two atomic lattices. Whereas Bernal-stacked graphene is most commonly studied, a rotational mismatch between layers opens up a whole new field of rich physics, especially at small interlayer twist. Here we report on magnetotransport measurements on twisted graphene bilayers, prepared by folding of single layers. These reveal a strong dependence on the twist angle, which can be estimated by means of sample geometry. At small rotation, superlattices with a wavelength in the order of 10 nm arise and are observed by friction atomic force microscopy. Magnetotransport measurements in this small-angle regime show the formation of satellite Landau fans. These are attributed to additional Dirac singularities in the band structure and discussed with respect to the wide range of interlayer coupling models.
UR - http://www.scopus.com/inward/record.url?scp=84923364841&partnerID=8YFLogxK
U2 - 10.1038/ncomms6742
DO - 10.1038/ncomms6742
M3 - Article
AN - SCOPUS:84923364841
VL - 5
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
M1 - 5742
ER -