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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2012

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

Résumé

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.

Dates et versions

hal-00982681 , version 1 (24-04-2014)

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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), 2012, 86 (121), pp.121404. ⟨10.1103/PhysRevB.86.121404⟩. ⟨hal-00982681⟩
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