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Abstract
We find a systematic reappearance of massive Dirac features at the edges of consecutive minibands formed at magnetic fields B p/q =pq ϕ 0 /S providing rational magnetic flux through a unit cell of the moiré superlattice created by a hexagonal substrate for electrons in graphene. The Dirac-type features in the minibands at B=B p/q determine a hierarchy of gaps in the surrounding fractal spectrum and show that these minibands have topological insulator properties. Using the additional q -fold degeneracy of magnetic minibands at B p/q , we trace the hierarchy of the gaps to their manifestation in the form of incompressible states upon variation of the carrier density and magnetic field.
Original language | English |
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Article number | 075401 |
Pages (from-to) | 1 - 5 |
Number of pages | 5 |
Journal | Physical Review B |
Volume | 89 |
Issue number | 7 |
Early online date | 5 Feb 2014 |
DOIs | |
Publication status | Published - Feb 2014 |
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Dive into the research topics of 'Dirac edges of fractal magnetic minibands in graphene with hexagonal moiré superlattices'. Together they form a unique fingerprint.Projects
- 1 Finished
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Physics of Graphene/Hexagonal Boron Nitride Heterostructures
Mucha-Kruczynski, M. (PI)
Engineering and Physical Sciences Research Council
1/12/13 → 30/11/15
Project: Research council