p-wave triggered superconductivity in single layer graphene on an electron-doped oxide superconductor
Di Bernardo, Angelo; Millo, Oded; Barbone, Matteo; Alpern, Hen; Kalcheim, Yoam; Sassi, Ugo; Ott, Anna; De Fazio, Domenico; Yoon, Duhee; Amado, Mario; Ferrari, Andrea; Linder, Jacob; Robinson, Jason W.A.
Journal article, Peer reviewed
Published version
View/ Open
Date
2017Metadata
Show full item recordCollections
- Institutt for fysikk [2764]
- Publikasjoner fra CRIStin - NTNU [38937]
Original version
10.1038/ncomms14024Abstract
Electron pairing in the vast majority of superconductors follows the Bardeen–Cooper–Schrieffer theory of superconductivity, which describes the condensation of electrons into pairs with antiparallel spins in a singlet state with an s-wave symmetry. Unconventional superconductivity was predicted in single-layer graphene (SLG), with the electrons pairing with a p-wave or chiral d-wave symmetry, depending on the position of the Fermi energy with respect to the Dirac point. By placing SLG on an electron-doped (non-chiral) d-wave superconductor and performing local scanning tunnelling microscopy and spectroscopy, here we show evidence for a p-wave triggered superconducting density of states in SLG. The realization of unconventional superconductivity in SLG offers an exciting new route for the development of p-wave superconductivity using two-dimensional materials with transition temperatures above 4.2 K.