TY - JOUR
T1 - All-graphene edge contacts
T2 - Electrical resistance of graphene T-junctions
AU - Jacobsen, Kåre Wedel
AU - Falkenberg, Jesper Toft
AU - Papior, Nick Rübner
AU - Bøggild, Peter
AU - Jauho, Antti-Pekka
AU - Brandbyge, Mads
PY - 2016
Y1 - 2016
N2 - Using ab-initio methods we investigate the possibility of three-terminalgraphene "T-junction" devices and show that these all-graphene edge contactsare energetically feasible when the 1D interface itself is free from foreignatoms. We examine the energetics of various junction structures as a functionof the atomic scale geometry. Three-terminal equilibrium Green's functions areused to determine the transmission spectrum and contact resistance of thesystem. We find that the most symmetric structures have a significant bindingenergy, and we determine the contact resistances in the junction to be in therange of 1-10 kΩμm which is comparable to the best contact resistance reportedfor edge-contacted graphene-metal contacts. We conclude that conductingall-carbon T-junctions should be feasible.
AB - Using ab-initio methods we investigate the possibility of three-terminalgraphene "T-junction" devices and show that these all-graphene edge contactsare energetically feasible when the 1D interface itself is free from foreignatoms. We examine the energetics of various junction structures as a functionof the atomic scale geometry. Three-terminal equilibrium Green's functions areused to determine the transmission spectrum and contact resistance of thesystem. We find that the most symmetric structures have a significant bindingenergy, and we determine the contact resistances in the junction to be in therange of 1-10 kΩμm which is comparable to the best contact resistance reportedfor edge-contacted graphene-metal contacts. We conclude that conductingall-carbon T-junctions should be feasible.
U2 - 10.1016/j.carbon.2016.01.084
DO - 10.1016/j.carbon.2016.01.084
M3 - Journal article
SN - 0008-6223
VL - 101
SP - 101
EP - 106
JO - Carbon
JF - Carbon
ER -