Imperial College London
Alternate

ProfessorNeilAlford

Faculty of Engineering, Department of Materials

Professor of Materials
 
 
 
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Contact

 

+44 (0)20 7594 6724n.alford

 
 
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Assistant

 

Ms Karen Murphy +44 (0)20 7594 3330

 
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Location

 

2..05 (in RSM)Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Niedermeier:2016:10.1038/srep31230,
author = {Niedermeier, CA and Råsander, M and Rhode, S and Kachkanov, V and Zou, B and Alford, N and Moram, MA},
doi = {10.1038/srep31230},
journal = {Scientific Reports},
title = {Band gap bowing in NixMg1-xO.},
url = {http://dx.doi.org/10.1038/srep31230},
volume = {6},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Epitaxial transparent oxide NixMg1-xO (0 ≤ x ≤ 1) thin films were grown on MgO(100) substrates by pulsed laser deposition. High-resolution synchrotron X-ray diffraction and high-resolution transmission electron microscopy analysis indicate that the thin films are compositionally and structurally homogeneous, forming a completely miscible solid solution. Nevertheless, the composition dependence of the NixMg1-xO optical band gap shows a strong non-parabolic bowing with a discontinuity at dilute NiO concentrations of x < 0.037. Density functional calculations of the NixMg1-xO band structure and the density of states demonstrate that deep Ni 3d levels are introduced into the MgO band gap, which significantly reduce the fundamental gap as confirmed by optical absorption spectra. These states broaden into a Ni 3d-derived conduction band for x > 0.074 and account for the anomalously large band gap narrowing in the NixMg1-xO solid solution system.
AU  - Niedermeier,CA
AU  - Råsander,M
AU  - Rhode,S
AU  - Kachkanov,V
AU  - Zou,B
AU  - Alford,N
AU  - Moram,MA
DO  - 10.1038/srep31230
PY  - 2016///
SN  - 2045-2322
TI  - Band gap bowing in NixMg1-xO.
T2  - Scientific Reports
UR  - http://dx.doi.org/10.1038/srep31230
UR  - http://hdl.handle.net/10044/1/39293
VL  - 6
ER  -
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