The Gruneisen parameter is a very important parameter for validating the strain response in graphene and graphite.
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Article Raman modes and Grüneisen parameters of graphite under compr...
The stress dependence of the most relevant Raman features of graphite has been analysed in detail under compressive biaxial stresses up to 5 GPa. To our knowledge, our experimental results for the stress dependence of the bands D, D0 , (T + D), (D + G), 2G, 2D0 are the first reported so far. Our Raman experiments complemented with DFT calculations of phonon dispersion curves as a function of stress, show different stress slopes for the resonant modes D and D0 . This confirms that previous assignments to the iTO and LO phonon branches, respectively, also hold under stress conditions. A complete set of Gru¨neisen parameters are also provided for all the Raman features of graphite using the stress dependencies of the frequencies as obtained from a second derivative analysis of the measured Raman spectra. Our results show that the D band and its overtones present larger Gru¨neisen parameters than the G band. Again, some results are reported here for the first time here
Safwan al-qawabah sir, thanks for your response.
Let us think practically of the case of graphite or high-quality multilayer graphene (~500 layers). So, there is no defect (D) peak in the Raman spectrum. Then, the most intense peak is G-peak. Can you tell me the Gruneisen parameter for the G-peak in that case so that we can know about the biaxial strain response when looking at its vibrational properties?
Dear Mukesh Pandey,
Greetings, you may want to see the following paper:
Article Raman modes and Grüneisen parameters of graphite under compr...
Regards, Saeed
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