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SUMMARY:Hybrid functional devices based on graphene - Vincent Bouchiat\, I
 nstitut Néel\, CNRS-Grenoble\, France
DTSTART:20151126T160000Z
DTEND:20151126T170000Z
UID:TALK60266@talks.cam.ac.uk
CONTACT:Stephen Walley
DESCRIPTION:Graphene has a great potential for implementation of tunable f
 ield effect devices. The accessible and surface-exposed 2D electron gas of
 fered by graphene provides indeed an ideal platform on which to tune\, via
  application of an electrostatic gate\, the coupling between adsorbates de
 posited on its surface. This situation is particularly interesting when th
 e network of adsorbates can induce some electronic order within the underl
 ying graphene substrate\, such as magnetic or superconducting correlations
 . We have experimentally studied the case of macroscopic graphene transist
 ors decorated with an array of superconducting tin nanoparticles\, which i
 nduce via percolation of proximity effect a global but tunable 2D supercon
 ducting state which critical temperature Tc can be tuned by gate voltage. 
  I will present other types of generic systems where molecules on top of g
 raphene see their interaction modulated by the electrostatic field applied
  to the graphene layer. In that second type of experiment\, we use Raman s
 pectroscopy as the probe te measure the modulated interaction.
LOCATION:Mott Seminar Room\, Cavendish Laboratory
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