Raman scattering from turbostratic graphitelike BC 4 under pressure

Raman spectra of turbostratic graphitelike BC 4 ( t -BC 4 ) were measured at room temperature and pressures up to 45 GPa on both compression and decompression. At ambient conditions, these Raman spectra contain lines that were not previously observed in Raman spectra of other graphitelike phases. Ra...

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Bibliographic Details
Published in:Journal of applied physics 2007-09, Vol.102 (6), p.063509-063509-5
Main Authors: Solozhenko, Vladimir L., Kurakevych, Oleksandr O., Kuznetsov, Alexei Yu
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Summary:Raman spectra of turbostratic graphitelike BC 4 ( t -BC 4 ) were measured at room temperature and pressures up to 45 GPa on both compression and decompression. At ambient conditions, these Raman spectra contain lines that were not previously observed in Raman spectra of other graphitelike phases. Raman bands of the starting BC 4 were assigned on the basis of the lattice dynamics of the ideal graphite structure and relaxation of the q -vector selection rule. The frequency of the E 2 g ( 2 ) in-plane mode at 1561   cm − 1 exhibits nonlinear behavior under pressure with the initial pressure coefficient of 7.3   cm − 1 / GPa . The general behavior of the E 2 g ( 2 ) band at high pressures is consistent with the model of pressure-induced buckling of layers.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.2781572