Journal
NANO LETTERS
Volume 17, Issue 6, Pages 3576-3581Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.7b00735
Keywords
Graphene; moire pattern; graphene superlattice; tertialy Dirac point Landau level
Categories
Funding
- National Key Research and Development Program of China [2016YFA0300703]
- NSF of China [11527805, 11425415, 11421404]
- National Basic Research Program of China (973 Program) [2013CB921902]
- Korean NRF [NRF-2016R1A2B4010105]
- National Research Foundation of Singapore [NRF-NRFF2012-01]
- JSPS KAKENHI [JP25107005, JP26248061, JP15K21722, JP25106006]
- NYU Shanghai
- NYU-ECNU Institute of Physics
- NSFC Research Fund for International Young Scientists [11550110177]
- Elemental Strategy Initiative
- Grants-in-Aid for Scientific Research [15K21722, 17K05496, 25107005] Funding Source: KAKEN
Ask authors/readers for more resources
The electronic structure of a crystalline solid is largely determined by its lattice structure. Recent advances in van der Waals solids, artificial crystals with controlled stacking of two-dimensional (2D) atomic films, have enabled the creation of materials with novel electronic structures. In particular, stacking graphene on hexagonal boron nitride (hBN) introduces a moire superlattice that fundamentally modifies graphenes band structure and gives rise to secondary Dirac points (SDPs). Here we find that the formation of a moire superlattice in graphene on hBN yields new, unexpected consequences: a set of tertiary Dirac points (TDPs) emerge, which give rise to additional sets of Landau levels when the sample is subjected to an external magnetic field. Our observations hint at the formation of a hidden Kekule superstructure on top of the moire superlattice under appropriate carrier doping and magnetic fields.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available