Theory of proximity-induced superconductivity in graphene
Abstract
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, T≪Tc, and zero magnetic field, the density of states is characterized by a small gap Eg≤Tc resulting from the collective proximity effect. Transverse magnetic field Hg(T)∝Eg 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 H(T).
- Publication:
-
Solid State Communications
- Pub Date:
- July 2009
- DOI:
- 10.1016/j.ssc.2009.02.049
- Bibcode:
- 2009SSCom.149.1101F