Ultrafast carrier dynamics in pristine and FeCl3-intercalated bilayer graphene

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

doi:10.1063/1.3497644

Ultrafast carrier dynamics in pristine and FeCl3-intercalated bilayer graphene

Mesoscale and Nanoscale Physics 2010-10-12 v1

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

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Abstract

Ultrafast carrier dynamics of pristine bilayer graphene (BLG) and bilayer graphene 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 of 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.

Keywords

ultrafast carrier dynamics bilayer graphene FeCl3 intercalation transient differential reflection fermi level electronic structure

Cite

@article{arxiv.1010.2073,
  title  = {Ultrafast carrier dynamics in pristine and FeCl3-intercalated bilayer graphene},
  author = {Xingquan Zou and Da Zhan and Xiaofeng Fan and Dongwook Lee and Saritha K. Nair and Li Sun and Zhenhua Ni and Zhiqiang Luo and Lei Liu and Ting Yu and Zexiang Shen and Elbert E. M. Chia},
  journal= {arXiv preprint arXiv:1010.2073},
  year   = {2010}
}

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14 pages, 4 figures

Ultrafast carrier dynamics in pristine and FeCl3-intercalated bilayer graphene

Abstract

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