Berry phase shift from 2 $\pi$ to $\pi$ in Bilayer graphene by Li-intercalation and sequential desorption

Ryota Akiyama, Yuma Takano, Yukihiro Endo +4

We have found that the Berry phase of bilayer graphene becomes from 2$\pi$ estimated by Shubnikov-de Haas oscillations when the A-B stacked pristine bilayer graphene experiences the…