Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Tuning the Effective Fine Structure Constant in Graphene: Opposing Effects of Dielectric Screening on Short-and Long-Range Potential Scattering
 

Summary: Tuning the Effective Fine Structure Constant in Graphene: Opposing Effects of Dielectric
Screening on Short- and Long-Range Potential Scattering
C. Jang,1
S. Adam,2
J.-H. Chen,1,3
E. D. Williams,1,3
S. Das Sarma,1,2
and M. S. Fuhrer1,3
1
Center for Nanophysics and Advanced Materials, University of Maryland, College Park, Maryland 20742-4111, USA
2
Condensed Matter Theory Center, University of Maryland, College Park, Maryland 20742-4111, USA
3
Materials Research Science and Engineering Center, Department of Physics, University of Maryland,
College Park, Maryland 20742-4111, USA
(Received 26 May 2008; published 3 October 2008)
We reduce the dimensionless interaction strength in graphene by adding a water overlayer in
ultrahigh vacuum, thereby increasing dielectric screening. The mobility limited by long-range impurity
scattering is increased over 30%, due to the background dielectric constant enhancement leading to a
reduced interaction of electrons with charged impurities. However, the carrier-density-independent

  

Source: Adam, Shaffique - Condensed Matter Theory Center, University of Maryland at College Park
Fuhrer, Michael S - Center for Superconductivity Research & Department of Physics, University of Maryland at College Park
Rubloff, Gary W. - Institute for Systems Research, University of Maryland at College Park

 

Collections: Materials Science; Physics