Temperature dependence of the dielectric tensor of monoclinic Ga2O3 single crystals in the spectral range 1.0–8.5 eV

The full dielectric tensor of monoclinic Ga2O3 (β-phase) was determined by generalized spectroscopic ellipsometry in the spectral range from 1.0 eV up to 8.5 eV and temperatures in the range from 10 K up to 300 K. By using the oriented dipole approach, the energies and broadenings of the excitonic t...

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Bibliographic Details
Published in:Applied physics letters 2017-08, Vol.111 (8)
Main Authors: Sturm, C., Schmidt-Grund, R., Zviagin, V., Grundmann, M.
Format: Article
Language:English
Subjects:
Applied physics
Beta phase
Crystals
Gallium oxides
Single crystals
Spectroellipsometry
Temperature dependence
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Summary:The full dielectric tensor of monoclinic Ga2O3 (β-phase) was determined by generalized spectroscopic ellipsometry in the spectral range from 1.0 eV up to 8.5 eV and temperatures in the range from 10 K up to 300 K. By using the oriented dipole approach, the energies and broadenings of the excitonic transitions are determined as a function of the temperature, and the exciton-phonon coupling properties are deduced.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4999763