Department of Physics Papers
Document Type
Journal Article
Date of this Version
12-27-2011
Abstract
The electronic spectra of rotationally faulted graphene bilayers are calculated using a continuum formulation for small fault angles that identifies two distinct electronic states of the coupled system. The low-energy spectra of one state features a Fermi velocity reduction, which ultimately leads to pairwise annihilation and regeneration of its low-energy Dirac nodes. The physics in the complementary state is controlled by pseudospin selection rules that prevent a Fermi velocity renormalization and produce second generation symmetry-protected Dirac singularities in the spectrum. These results are compared with previous theoretical analyses and with experimental data.
Recommended Citation
Mele, E. J. (2011). Band Symmetries and Singularities in Twisted Multilayer Graphene. Retrieved from https://repository.upenn.edu/physics_papers/217
Date Posted: 20 January 2012
This document has been peer reviewed.
Comments
Suggested Citation:
Mele, E. J. (2011). Band symmetries and singularities in twisted multilayer graphene. Physical Review B, 84, 235439.
© 2011 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Physical Review Band may be found at http://link.aps.org/doi/10.1103/PhysRevB.84.235439