  The intercalant alkaline metals, Ca, Sr, & Ba, are sources of a periodic
perturbation on the bilayer graphene, which leads to the formation of an N-type
semiconductors. The twist angle between graphene layers applies disorder to the
intercalated bilayer graphene to tune the bandgap. The twisted bilayer graphene
structures of C8MC8 (M: Ca, Sr, Ba) were studied for the Energy band diagrams,
Density of States, transport properties of Seebeck coefficient, Hall
coefficient, Thermal conductivity, and Electrical conductivity using
Quantum-Espresso and BoltzTrap software. The bandgap enhances with respect to
an increase in twist angle to values of technological requirements to implement
in real applications. The peak of the Seebeck coefficient & Hall Effect
increase, and Thermal Conductivity & Electrical Conductivity decrease for
different twist angles. Therefore, C8MC8 has a significant impact of the twist
angle, hence gives possible tailoring of material properties.
