Nondispersive Raman D band activated by well-ordered interlayer interactions in rotationally stacked bilayer graphene

被引：81

作者：

Gupta, Awnish K. ^{[1
]}

Tang, Youjian ^{[1
]}

Crespi, Vincent H. ^{[1
,2
,3
]}

Eklund, Peter C. ^{[1
,2
,3
]}

机构：

[1] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

[2] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA

[3] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 24期

基金：

美国国家科学基金会;

关键词：

GRAPHITE; CARBON; SPECTROSCOPY; SCATTERING; SPECTRA; FILMS; LAYER;

D O I：

10.1103/PhysRevB.82.241406

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Raman measurements on monolayer graphene folded back upon itself into skewed bilayer (i.e., with interlayer rotation) presents a mechanism for Raman scattering in sp(2) carbons in the D-band frequency range, but without disorder. Although the parent monolayer does not exhibit a D band, the interior of the skewed bilayer produces a strong two-peak Raman feature near 1350 cm(-1); one of these peaks is nondispersive, unlike all previously observed D-band features. Within a double-resonant model of Raman scattering, these features are consistent with a skewed bilayer coupling wherein one layer imposes a weak but well-ordered perturbation on the other. The discrete Fourier structure of the rotated interlayer interaction potential explains the unusual nondispersive peak.

引用

页数：4

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