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research article

Long- versus Short-Range Scattering in Doped Epitaxial Graphene

Strasser, C.
•
Ludbrook, B. M.
•
Levy, G.
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2015
Nano Letters

Tuning the electronic properties of graphene by adatom deposition unavoidably introduces disorder into the system, which directly affects the single-particle excitations and electrodynamics. Using angle-resolved photoemission spectroscopy (ARPES) we trace the evolution of disorder in graphene by thallium adatom deposition and probe its effect on the electronic structure. We show that the signatures of quasiparticle scattering in the photoemission spectral function can be used to identify thallium adatoms, although charged, as efficient short-range scattering centers. Employing a self-energy model for short-range scattering, we are able to extract a d-like scattering potential delta = -3.2 +/- 1 eV. Therefore, isolated charged scattering centers do not necessarily act just as good long-range (Coulomb) scatterers but can also act as efficient short-range (delta-like) scatterers; in the case of thallium, this happens with almost equal contributions from both mechanisms.

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Type
research article
DOI
10.1021/nl504155f
Web of Science ID

WOS:000354906000009

Author(s)
Strasser, C.
Ludbrook, B. M.
Levy, G.
Macdonald, A. J.
Burke, S. A.
Wehling, T. O.
Kern, K.  
Damascelli, A.
Ast, C. R.
Date Issued

2015

Publisher

Amer Chemical Soc

Published in
Nano Letters
Volume

15

Issue

5

Start page

2825

End page

2829

Subjects

Graphene

•

long-range (Coulomb) scattering

•

short-range scattering

•

self-energy

•

angular resolved photoemission spectroscopy

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LSEN  
Available on Infoscience
September 28, 2015
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/119433
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