Display options
Share it on

Phys Rev Lett. 2013 Jun 14;110(24):246803. doi: 10.1103/PhysRevLett.110.246803. Epub 2013 Jun 13.

Magnetoplasmons in quasineutral epitaxial graphene nanoribbons.

Physical review letters

J M Poumirol, W Yu, X Chen, C Berger, W A de Heer, M L Smith, T Ohta, W Pan, M O Goerbig, D Smirnov, Z Jiang

Affiliations

  1. National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA.
  2. School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
  3. School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA and CNRS/Institut Néel, BP166, 38042 Grenoble, France.
  4. Sandia National Laboratories, Albuquerque, New Mexico 87185, USA.
  5. Laboratoire de Physique des Solides, CNRS UMR 8502, Université Paris-Sud, F-91405 Orsay cedex, France.

PMID: 25165953 DOI: 10.1103/PhysRevLett.110.246803

Abstract

We present an infrared transmission spectroscopy study of the inter-Landau-level excitations in quasineutral epitaxial graphene nanoribbon arrays. We observed a substantial deviation in energy of the L(0(-1)) → L(1(0)) transition from the characteristic square root magnetic-field dependence of two-dimensional graphene. This deviation arises from the formation of an upper-hybrid mode between the Landau-level transition and the plasmon resonance. In the quantum regime, the hybrid mode exhibits a distinct dispersion relation, markedly different from that expected for conventional two-dimensional systems and highly doped graphene.

Publication Types