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PHYSICAL REVIEW B 84, 235421 (2011) Mechanism for puddle formation in graphene
 

Summary: PHYSICAL REVIEW B 84, 235421 (2011)
Mechanism for puddle formation in graphene
S. Adam,1
Suyong Jung,1,2
Nikolai N. Klimov,1,2,3
Nikolai B. Zhitenev,1
Joseph A. Stroscio,1
and M. D. Stiles1
1
Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
2
Maryland NanoCenter, University of Maryland, College Park, MD 20472, USA
3
Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
(Received 7 October 2011; published 5 December 2011)
When graphene is close to charge neutrality, its energy landscape is highly inhomogeneous, forming a sea of
electron-like and hole-like puddles that determine the properties of graphene at low carrier density. However,
the details of the puddle formation have remained elusive. We demonstrate numerically that in sharp contrast
to monolayer graphene, the normalized autocorrelation function for the puddle landscape in bilayer graphene
depends only on the distance between the graphene and the source of the long-ranged impurity potential.

  

Source: Adam, Shaffique - Condensed Matter Theory Center, University of Maryland at College Park

 

Collections: Physics