TY - JOUR
T1 - Tuning edge state localization in graphene nanoribbons by in-plane bending
AU - Jacobse, P.H.
AU - Stuij, Simon
AU - Juricic, V.
AU - de Morais Smith, Cristiane
PY - 2015/8/19
Y1 - 2015/8/19
N2 - The electronic properties of graphene are influenced by both geometric confinement and strain. We study the electronic structure of in-plane bent graphene nanoribbons, systems where confinement and strain are combined. To understand its electronic properties, we develop a tight-binding model that has a small computational cost and is based on exponentially decaying hopping and overlap parameters. Using this model, we show that the edge states in zigzag graphene nanoribbons are sensitive to bending and develop an effective dispersion that can be described by a one-dimensional atomic chain model. Because the velocity of the electrons at the edge is proportional to the slope of the dispersion, the edge states become gradually delocalized upon increasing the strength of bending.
AB - The electronic properties of graphene are influenced by both geometric confinement and strain. We study the electronic structure of in-plane bent graphene nanoribbons, systems where confinement and strain are combined. To understand its electronic properties, we develop a tight-binding model that has a small computational cost and is based on exponentially decaying hopping and overlap parameters. Using this model, we show that the edge states in zigzag graphene nanoribbons are sensitive to bending and develop an effective dispersion that can be described by a one-dimensional atomic chain model. Because the velocity of the electrons at the edge is proportional to the slope of the dispersion, the edge states become gradually delocalized upon increasing the strength of bending.
U2 - 10.1103/PhysRevB.92.075424
DO - 10.1103/PhysRevB.92.075424
M3 - Article
SN - 1098-0121
VL - 92
JO - Physical review. B, Condensed matter and materials physics
JF - Physical review. B, Condensed matter and materials physics
IS - 7
ER -