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Budagosky Marcilla, Jorge Alejandro; García Cristóbal, Alberto; Cros Stotter, Ana | |||
Aquest document és un/a article, creat/da en: 2008 | |||
Este documento está disponible también en : http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=JAPIAU000104000009094904000001&idtype=cvips&prog=normal&doi=10.1063/1.3006892 |
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Raman scattering has been used to study the temperature dependence of the frequency and linewidth of the E2h phonon mode of GaN/AlN quantum dot stacks grown on 6H-SiC. The evolution of the nonpolar phonon mode was analyzed in the temperature range from 80 to 655 K for both quantum dots and barrier materials. The experimental results are interpreted by comparison with a model that takes into account symmetric phonon decay and the different thermal expansions of the constituents of the heterostructure. We find a small increase in the anharmonic parameters of the phonon modes in the heterostructure with respect to bulk. | |||
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