  Twist bilayer graphenes with magical angle have nearly flat band, which
become strongly correlated electron systems. Herein, we propose another system
based on strained bilayer graphene that have flat band at the intrinsic Fermi
level. The top and bottom layers are uniaxially stretched along different
directions. When the strength and directions of the strain satisfy certain
condition, the periodical lattices of the two layers are commensurate to each
other. The regions with AA, AB and BA stacking arrange in a triangular lattice.
With magical strain, the bands around the intrinsic Fermi level are nearly flat
and have large gap from the other bands. This system could provide more
feasible platform for graphene-based integrated electronic system with
superconductivity.
