Volume 108, Number 4, November 2014
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||21 November 2014|
Effect of inter-adatoms correlations on the local density of states of graphene
1 IGCE, Unesp - Univ Estadual Paulista, Departamento de Física - 13506-900, Rio Claro, SP, Brazil
2 Departamento de Física e Química, Unesp - Univ Estadual Paulista - 15385-000, Ilha Solteira, SP, Brazil
3 Division of Physics and Applied Physics, Nanyang Technological University - 637371, Singapore
4 Instituto de Física, Universidade Federal de Uberlândia - 38400-902, Uberlândia, MG, Brazil
5 Science Institute, University of Iceland - Dunhagi-3, IS-107, Reykjavik, Iceland
Received: 5 August 2014
Accepted: 29 October 2014
We discuss theoretically the local density of states (LDOS) of a graphene sheet hosting two distant adatoms located at the center of hexagonal cells. By putting laterally a scanning tunneling microscope (STM) tip over a carbon atom, two remarkable novel effects can be detected: i) a multilevel structure in the LDOS and ii) beating patterns in the induced LDOS. We show that both phenomena occur nearby the Dirac points and are highly anisotropic. Furthermore, we propose conductance experiments employing STM as a probe for the observation of such exotic manifestations in the LDOS of graphene induced by inter-adatoms correlations.
PACS: 72.80.Vp – Electronic transport in graphene / 07.79.Cz – Scanning tunneling microscopes / 72.10.Fk – Scattering by point defects, dislocations, surfaces, and other imperfections (including Kondo effect)
© EPLA, 2014
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