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RESEARCH PRODUCT
Valence-band splitting energies in wurtzite InP nanowires : Photoluminescence spectroscopy and ab initio calculations
M. J. S. P. BrasilT. ChiaramonteM. M. De LimaE. G. GadretFernando IikawaMônica A. CottaC. V. R. S. RuffoDaniel UgarteLuis C. O. DacalLuiz H. G. TizeiGuilherme Osvaldo DiasAndrés Cantarerosubject
PhotoluminescenceMaterials scienceNanoestructuresNanowireAb initioPhysics::OpticsCondensed Matter PhysicsCondensed Matter::Mesoscopic Systems and Quantum Hall EffectSpectral lineElectronic Optical and Magnetic MaterialsCondensed Matter::Materials ScienceAb initio quantum chemistry methodsPhotoluminescence excitationAtomic physicsSpectroscopyWurtzite crystal structuredescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-09-29 |