Ultrafast carrier dynamics in pristine and FeCl3-intercalated bilayer graphene

被引：30

作者：

Zou, Xingquan ^{[1
]}

Zhan, Da ^{[1
]}

Fan, Xiaofeng ^{[1
]}

Lee, Dongwook ^{[1
]}

Nair, Saritha K. ^{[1
]}

Sun, Li ^{[1
]}

Ni, Zhenhua ^{[1
]}

Luo, Zhiqiang ^{[1
]}

Liu, Lei ^{[1
]}

Yu, Ting ^{[1
]}

Shen, Zexiang ^{[1
]}

Chia, Elbert E. M. ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 14期

基金：

新加坡国家研究基金会;

关键词：

ELECTRONIC-STRUCTURE; EPITAXIAL GRAPHENE; GRAPHITE; SPECTROSCOPY; RELAXATION;

D O I：

10.1063/1.3497644

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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. (C) 2010 American Institute of Physics. [doi:10.1063/1.3497644]

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