TY - JOUR
T1 - Giant tunnel-electron injection in nitrogen-doped graphene
AU - Lagoute, Jerome
AU - Joucken, Frederic
AU - Repain, Vincent
AU - Tison, Yann
AU - Chacon, Cyril
AU - Bellec, Amandine
AU - Girard, Yann
AU - Sporken, Robert
AU - Conrad, Edward H.
AU - Ducastelle, Francois
AU - Palsgaard, Mattias Lau Nøhr
AU - Andersen, Nick Papior
AU - Brandbyge, Mads
AU - Rousset, Sylvie
PY - 2015
Y1 - 2015
N2 - Scanning tunneling microscopy experiments have been performed to measure the local electron injection in nitrogen-doped graphene on SiC(000) and were successfully compared to ab initio calculations. In graphene, a gaplike feature is measured around the Fermi level due to a phonon-mediated tunneling channel. At nitrogen sites, this feature vanishes due to an increase of the elastic channel that is allowed because of symmetry breaking induced by the nitrogen atoms. A large conductance enhancement by a factor of up to 500 was measured at the Fermi level by comparing local spectroscopy at nitrogen sites and at carbon sites. Nitrogen doping can therefore be proposed as a way to improve tunnel-electron injection in graphene.
AB - Scanning tunneling microscopy experiments have been performed to measure the local electron injection in nitrogen-doped graphene on SiC(000) and were successfully compared to ab initio calculations. In graphene, a gaplike feature is measured around the Fermi level due to a phonon-mediated tunneling channel. At nitrogen sites, this feature vanishes due to an increase of the elastic channel that is allowed because of symmetry breaking induced by the nitrogen atoms. A large conductance enhancement by a factor of up to 500 was measured at the Fermi level by comparing local spectroscopy at nitrogen sites and at carbon sites. Nitrogen doping can therefore be proposed as a way to improve tunnel-electron injection in graphene.
KW - PHYSICS,
U2 - 10.1103/PhysRevB.91.125442
DO - 10.1103/PhysRevB.91.125442
M3 - Journal article
SN - 0163-1829
VL - 91
JO - Physical Review B Condensed Matter
JF - Physical Review B Condensed Matter
IS - 12
M1 - 125442
ER -