Strain effect on quantum conductance of graphene nanoribbons from maximally localized Wannier functions

Details Strain effect on quantum conductance of graphene nanoribbons from maximally localized Wannier functions Strain effect on quantum conductance of graphene nanoribbons from maximally localized Wannier functions

2010-06-24

arxiv.org/abs/1006.4759v1

Phys. Rev. B 81, 125409 , 2010

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevB.81.125409

Density functional study of strain effects on the electronic band structure and transport prop- erties of the graphene nanoribbons (GNR) is presented. We apply a uniaxial strain in the x (nearest-neighbor) and y (second nearest-neighbor) directions, related to the deformation of zigzag and armchair edge GNRs (AGNR and ZGNR), respectively. We calculate the quantum conduc- tance and band structures of the GNR using the Wannier function in a strain range from -8% to +8% (minus and plus signs show compression and tensile strain). As strain increases, depending on the AGNR family type, the electrical conductivity changes from an insulator to a conductor. This is accompanied by a variation in the electron and hole effective masses. The compression x direction strain in ZGNR shifts some bands to below the Fermi level (Ef ) and the quantum conductance does not change, but the tensile x direction strain causes an increase in the quantum conductance to 10e2/h near the Ef . For transverse direction, it is very sensitive to strain and the tensile y direction strain causes an increase in the conductance while the compressive y direction strain decreases the conductance at first but increases later.

Affiliated with

Also associated with

No associations

Rating

Strain effect on quantum conductance of graphene nanoribbons from maximally localized Wannier functions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Strain effect on quantum conductance of graphene nanoribbons from maximally localized Wannier functions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Strain effect on quantum conductance of graphene nanoribbons from maximally localized Wannier functions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-675718