Phys. Rev. B 92, 075417(2015)
We present a numerical study on the uniformity of the pseudomagnetic field in graphene as a function of the relative orientation between the graphene lattice and straining directions. We calculated the deformation of a regular micron-sized graphene hexagon by symmetrically displacing three of its edges. We found that the pseudomagnetic field is strongest if the strain is applied perpendicular to the armchair direction of graphene. For a hexagon with a side length of 1μm, the pseudomagnetic field has a maximum of 1.2 T for an applied strain of 3.5% and it is uniform (variance <1%) within a circle with a diameter of ∼520 nm. This diameter is on the order of the typical diameter of the laser spot in a state-of-the-art confocal Raman spectroscopy setup, which suggests that observing the pseudomagnetic field in measurements of shifted magnetophonon resonance is feasible.