Proximity-induced superconductivity in graphene
M. V. Feigel'man, M. A. Skvortsov, K. S. Tikhonov
L.D. Landau Institute for Theoretical Physics RAS, 119334 Moscow, Russia
Moscow Institute of Physics and Technology, 141700 Moscow, Russia
PACS: 74.20.-z, 74.78.-w, 74.81.-g
We propose a way of making graphene superconductive by putting on
it small superconductive islands which cover a tiny fraction of graphene
area. We show that the critical temperature, Tc, can reach several Kelvins
at the experimentally accessible range of parameters.
At low temperatures, , and zero magnetic field,
the density of states is characterized by a small gap
resulting from the collective proximity effect.
Transverse magnetic field is expected to destroy
the spectral gap driving graphene layer to a
kind of a superconductive glass state.
Melting of the glass state into a metal occurs
at a higher field Hg2(T).