Attraction-repulsion transition in the interaction of adatoms and vacancies in graphene

S. LeBohec, J. Talbot, and E. G. Mishchenko
Phys. Rev. B 89, 045433 – Published 31 January 2014

Abstract

The interaction of two resonant impurities in graphene has been predicted to have a long-range character with weaker repulsion when the two adatoms reside on the same sublattice and stronger attraction when they are on different sublattices. We reveal that this attraction results from a single energy level. This opens up a possibility of controlling the sign of the impurity interaction via the adjustment of the chemical potential. For many randomly distributed impurities (adatoms or vacancies) this may offer a way to achieve a controlled transition from aggregation to dispersion.

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  • Received 7 November 2013
  • Revised 17 January 2014

DOI:https://doi.org/10.1103/PhysRevB.89.045433

©2014 American Physical Society

Authors & Affiliations

S. LeBohec, J. Talbot, and E. G. Mishchenko

  • Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA

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Issue

Vol. 89, Iss. 4 — 15 January 2014

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