▎ 摘　　要

We investigate the longitudinal and transverse piezoresistance effect in suspended graphene in the ballistic regime. Utilizing parametrized tight-binding Hamiltonian along with Landauer quantum transport formalism, we devise a methodology to evaluate the piezoresistance effect in graphene. We evaluate the longitudinal and transverse gauge factor of graphene along armchair and zigzag directions in the linear elastic limit (0%-10%). The gauge factors along armchair and zigzag directions are identical. Our model predicts a significant enhancement (approximate to 1000%) in the value of transverse gauge factor compared to longitudinal gauge factor along with sign inversion. The calculated value of longitudinal gauge factor is approximate to 0.3, whereas the transverse gauge factor is approximate to-3.3. We rationalize our prediction based on the deformation of Dirac cone and change in separation between transverse modes due to longitudinal and transverse strain. The results obtained herein can serve as a template for high-strain piezoresistance effect of graphene in nanoelectromechanical systems.