TY - JOUR
T1 - Giant reduction of charge carrier mobility in strained graphene
AU - Shah, Raheel
AU - Mohiuddin, Tariq M.G.
AU - Singh, Ram N.
PY - 2013/1/30
Y1 - 2013/1/30
N2 - Impact of induced strain on charge carrier mobility is investigated for a monolayer graphene sheet. The unsymmetrical hopping parameters between nearest neighbor atoms which emanate from induced strain are included in the density of states description. Mobility is then computed within the Born approximation by including three scattering mechanisms; charged impurity, surface roughness and lattice phonons interaction. Unlike its strained silicon counterpart, simulations reveal a significant drop in mobility for graphene with increasing strain. Additionally, mobility anisotropy is observed along the zigzag and armchair orientations. The prime reason for the drop in mobility can be attributed to the change in Fermi velocity due to strain induced distortions in the graphene honeycomb lattice.
AB - Impact of induced strain on charge carrier mobility is investigated for a monolayer graphene sheet. The unsymmetrical hopping parameters between nearest neighbor atoms which emanate from induced strain are included in the density of states description. Mobility is then computed within the Born approximation by including three scattering mechanisms; charged impurity, surface roughness and lattice phonons interaction. Unlike its strained silicon counterpart, simulations reveal a significant drop in mobility for graphene with increasing strain. Additionally, mobility anisotropy is observed along the zigzag and armchair orientations. The prime reason for the drop in mobility can be attributed to the change in Fermi velocity due to strain induced distortions in the graphene honeycomb lattice.
KW - Charge carrier mobility
KW - Graphene transport
KW - Strained grapheme
UR - http://www.scopus.com/inward/record.url?scp=84872698581&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84872698581&partnerID=8YFLogxK
U2 - 10.1142/S0217984913500218
DO - 10.1142/S0217984913500218
M3 - Article
AN - SCOPUS:84872698581
SN - 0217-9849
VL - 27
JO - Modern Physics Letters B
JF - Modern Physics Letters B
IS - 3
M1 - 1350021
ER -