Berry phase shift from 2 $\pi$ to $\pi$ in Bilayer graphene by Li-intercalation and sequential desorption
Mesoscale and Nanoscale Physics
2017-06-07 v1 Materials Science
Abstract
We have found that the Berry phase of bilayer graphene becomes from 2 estimated by Shubnikov-de Haas oscillations when the A-B stacked pristine bilayer graphene experiences the Li-intercalation and sequential Li-desorption process in ultrahigh vacuum. Furthermore, the mobility of such processed bilayer graphene increases around four times larger, ~ 8,000 cm2/Vs, than that of the pristine bilayer graphene. This is mainly due to increment of the scattering time and decrement of the cyclotron mass, which can be interpreted as a result of the change of the stacking structure of bilayer graphene from A-B to A-A, corresponding to a change from the parabolic to the linear band dispersion.
Keywords
Cite
@article{arxiv.1701.03936,
title = {Berry phase shift from 2 $\pi$ to $\pi$ in Bilayer graphene by Li-intercalation and sequential desorption},
author = {Ryota Akiyama and Yuma Takano and Yukihiro Endo and Satoru Ichinokura and Ryosuke Nakanishi and Kentaro Nomura and Shuji Hasegawa},
journal= {arXiv preprint arXiv:1701.03936},
year = {2017}
}