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research article

Electronic Transport in Graphene with Aggregated Hydrogen Adatoms

Gargiulo, Fernando  
•
Autes, Gabriel  
•
Virk, Naunidh  
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2014
Physical Review Letters

Hydrogen adatoms and other species covalently bound to graphene act as resonant scattering centers affecting the electronic transport properties and inducing Anderson localization. We show that attractive interactions between adatoms on graphene and their diffusion mobility strongly modify the spatial distribution, thus fully eliminating isolated adatoms and increasing the population of larger size adatom aggregates. Such spatial correlation is found to strongly influence the electronic transport properties of disordered graphene. Our scaling analysis shows that such aggregation of adatoms increases conductance by up to several orders of magnitude and results in significant extension of the Anderson localization length in the strong localization regime. We introduce a simple definition of the effective adatom concentration x., which describes the transport properties of both random and correlated distributions of hydrogen adatoms on graphene across a broad range of concentrations.

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Type
research article
DOI
10.1103/PhysRevLett.113.246601
Web of Science ID

WOS:000346387700015

Author(s)
Gargiulo, Fernando  
Autes, Gabriel  
Virk, Naunidh  
Barthel, Stefan
Roesner, Malte
Toller, Lisa R. M.
Wehling, Tim O.
Yazyev, Oleg V.  
Date Issued

2014

Publisher

American Physical Society

Published in
Physical Review Letters
Volume

113

Issue

24

Article Number

246601

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
C3MP  
Available on Infoscience
February 20, 2015
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/111433
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