Journal
PHYSICAL REVIEW B
Volume 82, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.82.125319
Keywords
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Funding
- EU
- Ministry of Science and Innovation of Spain [MAT200910350]
- CAPES
- FAPESP
- CNPQ
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Photoluminescence excitation (PLE) spectra have been measured for a set of self-assembled InN nanowires (NWs) and a high-crystalline quality InN layer grown by molecular-beam epitaxy. The PLE experimental lineshapes have been reproduced by a self-consistent calculation of the absorption in a cylindrical InN NW. The differences in the PLE spectra can be accounted for the inhomogeneous electron distribution within the NWs caused by a bulk donor concentration (N(D)(+)) and a two-dimensional density of ionized surface states (N(ss)(+)). For NW radii larger than 30 nm, N(D)(+) and N(ss)(+) modify the absorption edge and the lineshape, respectively, and can be determined from the comparison with the experimental data.
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