Abstract

MARQUINA, J; POWER, Ch; QUINTERO, M  and  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.

Keywords : Semiconductors; anharmonicity; temperature; inelastic light scattering.