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SM ISO690:2012 GUK, Maxim, LEVCENKO, Sergiu, IZQUIERDO-ROCA, Víctor, FONTANE, Xavier, VALAKH, M., ARUSHANOV, Ernest, PEREZ-RODRIGUEZ, Alejandro. Polarized Raman scattering analysis of Cu2ZnSiS4 and Cu2ZnSiSe4 single crystals. In: Journal of Applied Physics, 2013, vol. 114, pp. 1-10. ISSN 0021-8979. DOI: https://doi.org/10.1063/1.4828885 |
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Journal of Applied Physics | |
Volumul 114 / 2013 / ISSN 0021-8979 /ISSNe 1089-7550 | |
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DOI:https://doi.org/10.1063/1.4828885 | |
Pag. 1-10 | |
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Rezumat | |
The polarized Raman spectra of the Cu2ZnSiS4 and Cu2ZnSiSe4 single crystals were investigated as a function of the in-plane rotation angle on the basal (210) crystal planes. The position of up to 32 (for the sulphide compound) and 27 (for the selenide compound) Raman peaks was determined for each of the compounds in the spectral region 50-600 cm-1. A careful analysis of the high resolution spectra that were measured under different polarization configurations has allowed determining the A1(TO), A2, and B1/B2(TO + LO) symmetry of the dominant and some weaker Raman modes. The investigation of the dependence of the intensity of the peaks with the rotation angle has corroborated the symmetry assignment of the main modes and has allowed to estimate numerical values of Raman tensor elements for these compounds. The importance of anharmonic one-two phonons interaction in the Raman spectra of the investigated crystals is discussed. |
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Cuvinte-cheie Engineering controlled terms Single crystals Engineering uncontrolled terms High-resolution spectra, Inplane rotation, Numerical values, Polarized Raman, Polarized Raman spectra, Scattering analysis, Spectral region, Symmetry assignment Engineering main heading Raman scattering |
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