Energy band of graphene ribbons under the tensile force

Details Energy band of graphene ribbons under the tensile force Energy band of graphene ribbons under the tensile force

2008-04-30

arxiv.org/abs/0804.4720v1

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

According to the tight-binding approximation, we investigate the electronic structures of graphene ribbons with zigzag shaped edges (ZGRs) and armchair shaped edges (AGRs) drawn by the tensile force, and obtain the analytic relations between the energy bands of pi-electrons in ZGR, AGR and the tensile force based on only considering the nearest-neighbor interaction and the hydrogen-like atomic wave function is considered as pi-electron wave function. Importantly, we find the tensile force can open an energy gap at the K point for ZGR and AGR, and the force perpendicular to the zigzag edges can open energy gap more easily besides the gap values of ZGR and AGR at the K point both increase as the tensile force increases.

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