Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/73111
Type: Artigo de periódico
Title: Valence-band splitting energies in wurtzite InP nanowires: Photoluminescence spectroscopy and ab initio calculations
Author: Gadret, EG
Dias, GO
Dacal, LCO
de Lima, MM
Ruffo, CVRS
Iikawa, F
Brasil, MJSP
Chiaramonte, T
Cotta, MA
Tizei, LHG
Ugarte, D
Cantarero, A
Abstract: We investigated experimentally and theoretically the valence-band structure of wurtzite InP nanowires. The wurtzite phase, which usually is not stable for III-V phosphide compounds, has been observed in InP nanowires. We present results on the electronic properties of these nanowires using the photoluminescence excitation technique. Spectra from an ensemble of nanowires show three clear absorption edges separated by 44 meV and 143 meV, respectively. The band edges are attributed to excitonic absorptions involving three distinct valence-bands labeled: A, B, and C. Theoretical results based on "ab initio" calculation gives corresponding valence-band energy separations of 50 meV and 200 meV, respectively, which are in good agreement with the experimental results.
Country: EUA
Editor: Amer Physical Soc
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.82.125327
Date Issue: 2010
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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