Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevB.84.085430
Title: Electronic doping of graphene by deposited transition metal atoms
Authors: Santos, J.E.
Peres, N.M.R.
Lopes Dos Santos, J.M.B.
Castro Neto, A.H. 
Issue Date: 26-Aug-2011
Citation: Santos, J.E., Peres, N.M.R., Lopes Dos Santos, J.M.B., Castro Neto, A.H. (2011-08-26). Electronic doping of graphene by deposited transition metal atoms. Physical Review B - Condensed Matter and Materials Physics 84 (8) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevB.84.085430
Abstract: We perform a phenomenological analysis of the problem of the electronic doping of a graphene sheet by deposited transition metal atoms, which aggregate in clusters. The sample is placed in a capacitor device such that the electronic doping of graphene can be varied by the application of a gate voltage and such that transport measurements can be performed via the application of a (much smaller) voltage along the graphene sample, as reported in the work of Pi. The analysis allows us to explain the thermodynamic properties of the device, such as the level of doping of graphene and the ionization potential of the metal clusters, in terms of the chemical interaction between graphene and the clusters. We are also able, by modeling the metallic clusters as perfectly conducting spheres, to determine the scattering potential due to these clusters on the electronic carriers of graphene and hence the contribution of these clusters to the resistivity of the sample. The model presented is able to explain the measurements performed by Pi on Pt-covered graphene samples at the lowest metallic coverages measured, and we also present a theoretical argument based on the above model that explains why significant deviations from such a theory are observed at higher levels of coverage. © 2011 American Physical Society.
Source Title: Physical Review B - Condensed Matter and Materials Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/96423
ISSN: 10980121
DOI: 10.1103/PhysRevB.84.085430
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

25
checked on Sep 19, 2018

WEB OF SCIENCETM
Citations

25
checked on Sep 4, 2018

Page view(s)

32
checked on Jul 27, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.