Temperature Coefficients of the Raman Peaks for the Single-Layer and Bi-Layer Graphene

Details Temperature Coefficients of the Raman Peaks for the Single-Layer and Bi-Layer Graphene Temperature Coefficients of the Raman Peaks for the Single-Layer and Bi-Layer Graphene

2007-08-09

arxiv.org/abs/0708.1223v1

Nano Letters, Vol. 7, No. 9, 2645 - 2649 (2007)

Physics

Condensed Matter

Materials Science

Scientific paper

We carried out micro-Raman spectroscopy of graphene layers over the temperature range from approximately 80 K to 370 K. The number of layers was independently confirmed by the quantum Hall measurements and atomic force microscopy. The measured values of the temperature coefficients for the G and 2D-band frequencies of the single-layer graphene are -0.016 1/(cm K) and -0.034 1/(cm K), respectively. The G peak temperature coefficient of the bi-layer graphene and bulk graphite are -0.015 1/(cm K) and -0.011 1/(cm K), respectively.

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