Theoretical 2D Raman band of strained graphene

被引：21

作者：

Popov, Valentin N. ^{[1
]}

Lambin, Philippe ^{[2
]}

机构：

[1] Univ Sofia, Fac Phys, BG-1164 Sofia, Bulgaria

[2] Univ Namur FUNDP, Res Ctr Phys Matter & Radiat, B-5000 Namur, Belgium

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 15期

关键词：

SPECTROSCOPY; GRAPHITE;

D O I：

10.1103/PhysRevB.87.155425

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the 2D Raman band of in-plane uniaxially strained graphene within a nonorthogonal tight-binding model. At nonzero strain, the obtained 2D band splits into two subbands at strain angles 0 degrees and 30 degrees or into three subbands at intermediate angles. The evolution of the 2D subbands is calculated systematically in the range of the accessible strains from -1% to 3% and for the commonly used laser photon energy from 1.5 to 3.0 eV. The strain rate and dispersion rate of the 2D subbands are derived and tabulated. In particular, these two quantities show large variations up to 50%. The results on the 2D subbands can be used for detecting and monitoring strain in graphene for nanoelectronics applications. DOI: 10.1103/PhysRevB.87.155425

引用

页数：7

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