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Temperature evolution of infrared- and Raman-active phonons in graphite

Abstract : We perform a comparative experimental and theoretical study of the temperature dependence up to 700 K of the frequency and linewidths of the graphite E1u and E2g optical phonons (∼1590 and 1580 cm−1) by infrared (IR) and Raman spectroscopy. Despite their similar character, the temperature dependence of the two modes is quite different, e.g., the frequency shift of the IR-active E1u mode is almost twice as big as that of the Raman-active E2g mode. Ab initio calculations of the anharmonic properties are in remarkable agreement with measurements and explain the observed behavior.
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https://hal.archives-ouvertes.fr/hal-00982681
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Submitted on : Thursday, April 24, 2014 - 11:24:38 AM
Last modification on : Wednesday, September 15, 2021 - 2:56:02 PM

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P. Giura, N. Bonini, G. Creff, J. B. Brubach, Pascal Roy, et al.. Temperature evolution of infrared- and Raman-active phonons in graphite. Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2012, 86 (121), pp.121404. ⟨10.1103/PhysRevB.86.121404⟩. ⟨hal-00982681⟩

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