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|Title:||Topologically protected zero modes in twisted bilayer graphene||Authors:||De Gail, R.
Castro Neto, A.H.
|Issue Date:||18-Jul-2011||Citation:||De Gail, R., Goerbig, M.O., Guinea, F., Montambaux, G., Castro Neto, A.H. (2011-07-18). Topologically protected zero modes in twisted bilayer graphene. Physical Review B - Condensed Matter and Materials Physics 84 (4) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevB.84.045436||Abstract:||We show that a twisted graphene bilayer can reveal unusual topological properties at low energies, as a consequence of a Dirac-point splitting. These features rely on a symmetry analysis of the electron hopping between the two layers of graphene and we derive a simplified effective low-energy Hamiltonian which captures the essential topological properties of a twisted graphene bilayer. The corresponding Landau levels peculiarly reveal a degenerate zero-energy mode which cannot be lifted by strong magnetic fields. © 2011 American Physical Society.||Source Title:||Physical Review B - Condensed Matter and Materials Physics||URI:||http://scholarbank.nus.edu.sg/handle/10635/98424||ISSN:||10980121||DOI:||10.1103/PhysRevB.84.045436|
|Appears in Collections:||Staff Publications|
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