0000000001216718

AUTHOR

A. García-cristóbal

showing 1 related works from this author

Temperature dependence of the E2h phonon mode of wurtzite GaN/AlN quantum dots

2008

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. jorbumar@alumni.uv.es Alberto.Garcia@uv.es Ana.Cros@uv.es

III-V semiconductorsMaterials scienceCondensed matter physicsPhononUNESCO::FÍSICAGallium compoundsGeneral Physics and AstronomyHeterojunctionAluminium compounds ; Gallium compounds ; III-V semiconductors ; Phonons ; Raman spectra ; Semiconductor quantum dots ; Thermal expansionAtmospheric temperature rangeCondensed Matter::Mesoscopic Systems and Quantum Hall EffectCondensed Matter::Materials Sciencesymbols.namesakeLaser linewidth:FÍSICA [UNESCO]Quantum dotsymbolsPhononsSemiconductor quantum dotsRaman spectraThermal expansionRaman spectroscopyAluminium compoundsRaman scatteringWurtzite crystal structureJournal of Applied Physics
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