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| Format: | Artículo científico |
| Language: | en |
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Sociedade Brasileira de Física
2010
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| Online Access: | https://www.redalyc.org/articulo.oa?id=46413563003 |
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Table of Contents:
- Comparison of some theoretical models for fittings of the temperature dependence of the fundamental energy gap in GaAs R. R. O. Morais I. F. L. Dias J. L. Duarte E. Laureto S. A. Lourenço E. C. F. da Silva A. A. Quivy Física, Astronomía y Matemáticas Non Zero point energy Gallium arsenide linear behavior of Eg(T) In this work we report on a comparison of some theoretical models usually used to fit the dependence on temperature of the fundamental energy gap of semiconductor materials. We used in our investigations the theoretical models of Viña, Pässler-p and Pässler-ρ to fit several sets of experimental data, available in the literature for the energy gap of GaAs in the temperature range from 12 to 974 K. Performing several fittings for different values of the upper limit of the analyzed temperature range (Tmax), we were able to follow in a systematic way the evolution of the fitting parameters up to the limit of high temperatures and make a comparison between the zero-point values obtained from the different models by extrapolating the linear dependence of the gaps at high T to T = 0 K and that determined by the dependence of the gap on isotope mass. Using experimental data measured by absorption spectroscopy, we observed the non-linear behavior of Eg(T) of GaAs for T >;D. 2010 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46413563003 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.1 Vol.40