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Revista mexicana de física
versão impressa ISSN 0035-001X
Resumo
MARQUINA, J; POWER, Ch; QUINTERO, M e GONZALEZ, J. Efectos anarmónicos en el semiconductor MnGa2Se. Rev. mex. fis. [online]. 2006, vol.52, suppl.3, pp.198-200. ISSN 0035-001X.
We have measured the temperature dependence of the first-order Raman scattering of MnGa2Se4 single-crystals in the range 4-700 K. The analysis of the temperature dependence of the optical phonons shows that the Raman shift is successfully modeled by including thermal expansion and phonon-phonon coupling. The pure temperature contribution is dominated by the cubic interactions (three-phonon coupling). Four- phonon coupling (quartic interaction) is less important.
Palavras-chave : Semiconductors; anharmonicity; temperature; inelastic light scattering.