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.

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

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Date Posted: 20 January 2012

This document has been peer reviewed.