Raman Spectroscopy Study of Rotated Double-Layer Graphene: Misorientation-Angle Dependence of Electronic Structure

被引：516

作者：

Kim, Kwanpyo ^{[1
,2
,3
]}

Coh, Sinisa ^{[1
,3
]}

Tan, Liang Z. ^{[1
,3
]}

Regan, William ^{[1
,3
]}

Yuk, Jong Min ^{[1
,3
,4
]}

Chatterjee, Eric ^{[1
]}

Crommie, M. F. ^{[1
,2
,3
]}

Cohen, Marvin L. ^{[1
,2
,3
]}

Louie, Steven G. ^{[1
,3
]}

Zettl, A. ^{[1
,2
,3
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Ctr Integrated Nanomech Syst, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA

[4] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon 305701, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 24期

基金：

美国国家科学基金会;

关键词：

BILAYER GRAPHENE; LARGE-AREA; FILMS;

D O I：

10.1103/PhysRevLett.108.246103

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a systematic Raman study of unconventionally stacked double-layer graphene, and find that the spectrum strongly depends on the relative rotation angle between layers. Rotation-dependent trends in the position, width and intensity of graphene 2D and G peaks are experimentally established and accounted for theoretically. Our theoretical analysis reveals that changes in electronic band structure due to the interlayer interaction, such as rotational-angle dependent Van Hove singularities, are responsible for the observed spectral features. Our combined experimental and theoretical study provides a deeper understanding of the electronic band structure of rotated double-layer graphene, and leads to a practical way to identify and analyze rotation angles of misoriented double-layer graphene.

引用

页数：6

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