Fig. 2

Trajectory movement of two Dirac points K₁, K₂ in the first BZ for the ξ = − 1 valley under twisting and uniaxial strain in bilayer graphene. k was measured with respect to the unstrained and untwisted Dirac point which was marked with “ + ” in figure. (a)–(b) Dirac points shift with the uniaxial strain when twist angle is fixed as θ = 1.05°. (c)–(d)The Dirac points shift with the strain direction and twist angle under strain magnitude s = 0.3%.