Berry phase shift from 2π to π in bilayer graphene by Li-intercalation and sequential desorption

Ryota Akiyama, Yuma Takano, Yukihiro Endo, Satoru Ichinokura, Ryosuke Nakanishi, Kentaro Nomura, Shuji Hasegawa

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We have found that the Berry phase of bilayer graphene becomes π from 2π 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, 8000 cm2/V·s, 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.

Original languageEnglish
Article number233106
JournalApplied Physics Letters
Volume110
Issue number23
DOIs
Publication statusPublished - 2017 Jun 5

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Berry phase shift from 2π to π in bilayer graphene by Li-intercalation and sequential desorption'. Together they form a unique fingerprint.

Cite this