Publications

Detailed Information

Theory of the electronic and transport properties of graphene under a periodic electric or magnetic field

Cited 14 time in Web of Science Cited 16 time in Scopus
Authors

Park, Cheol-Hwan; Zheng Tan, Liang; Louie, Steven G.

Issue Date
2011-01
Publisher
Elsevier BV
Citation
Physica E: Low-Dimensional Systems and Nanostructures, Vol.43 No.3, pp.651-656
Abstract
We discuss the novel electronic properties of graphene under an external periodic scalar or vector potential, and the analytical and numerical methods used to investigate them. When graphene is subjected to a one-dimensional periodic scalar potential, owing to the linear dispersion and the chiral (pseudospin) nature of the electronic states, the group velocity of its carriers is renormalized highly anisotropically in such a manner that the velocity is invariant along the periodic direction but is reduced the most along the perpendicular direction. Under a periodic scalar potential, new massless Dirac fermions are generated at the supercell Brillouin zone boundaries. Also, we show that if the strength of the applied scalar potential is sufficiently strong, new zero-energy modes may be generated. With the periodic scalar potential satisfying some special conditions, the energy dispersion near the Dirac point becomes quasi one-dimensional. On the other hand, for graphene under a one-dimensional periodic vector potential (resulting in a periodic magnetic field perpendicular to the graphene plane), the group velocity is reduced isotropically and monotonically with the strength of the potential. © 2010 ElsevierB.V. All rights reserved.
ISSN
1386-9477
URI
https://hdl.handle.net/10371/202355
DOI
https://doi.org/10.1016/j.physe.2010.07.022
Files in This Item:
There are no files associated with this item.
Appears in Collections:

Related Researcher

  • College of Natural Sciences
  • Department of Physics and Astronomy
Research Area Condensed Matter Physics, Nanoscale Photonics, Nanoscale Physics, 나노 물리와 나노 광자학, 응집 물질 물리

Altmetrics

Item View & Download Count

  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Share