Ultrafast carrier dynamics in pristine and FeCl3-intercalated bilayer graphene

作者：Zou Xingquan^*; Zhan Da; Fan Xiaofeng; Lee Dongwook; Nair Saritha K; Sun Li; Ni Zhenhua; Luo Zhiqiang; Liu Lei; Yu Ting; Shen Zexiang; Chia Elbert E M

来源：Applied Physics Letters, 2010, 97(14): 141910.

DOI：10.1063/1.3497644

Ultrafast carrier dynamics of pristine bilayer graphene (BLG) and BLG intercalated with FeCl3 (FeCl3-G), were studied using time-resolved transient differential reflection (Delta R/R). Compared to BLG, the FeCl3-G data showed an opposite sign of Delta R/R, a slower rise time, and a single (instead of double) exponential relaxation. We attribute these differences in dynamics to the down-shifting in the Fermi level in FeCl3-G, as well as the formation of numerous horizontal bands arising from the d-orbitals of Fe. Our work shows that intercalation can dramatically change the electronic structure of graphene, and its associated carrier dynamics.

• 出版日期2010-10-4
• 单位南阳理工学院