Double resonant Raman spectra in graphene and graphite: A two-dimensional explanation of the Raman amplitude

被引：64

作者：

Narula, Rohit ^{[1
]}

Reich, Stephanie

机构：

[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.78.165422

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report calculated Raman spectra of the D and 2D modes in graphene and graphite. Evaluating the Raman amplitude in the two-dimensional Brillouin zone, we reproduce the splitting of the modes when going from single-layer graphene to graphite. The energy dependence of the D mode in graphene is 24%-32% smaller than in graphite. We discuss the intensity of the D line and show that the double resonant phonons originate from the low-symmetry parts of the Brillouin zone.

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页数：6

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