| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Bellet-Amalric, Edith
CEA Grenoble
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2024Role of a capping layer on the crystalline structure of Sn thin films grown at cryogenic temperatures on InSb substratescitations
- 2023Role of a capping layer on the crystalline structure of Sn thin films grown at cryogenic temperatures on InSb substratescitations
- 2022200 mm-scale growth of 2D layered GaSe with preferential orientationcitations
- 2019Three-phase metal-insulator transition and structural alternative for a VO2 film epitaxially grown on Al2O3(0001)citations
- 2014Boron-doped superlattices and Bragg mirrors in diamondcitations
- 2011Strain relaxation in GaN/Al0.1Ga0.9N superlattices for mid-infrared intersubband absorptioncitations
- 2007Structure and magnetism of self-organized Ge(1-x)Mn(x) nano-columnscitations
- 2006High-Curie-temperature ferromagnetism in self-organized GeMn nanocolumns
- 2006Intrinsic ferromagnetism in wurtzite (Ga,Mn)N semiconductorcitations
- 2005X-ray absorption near-edge structure and valence state of Mn in (Ga,Mn)Ncitations
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article
X-ray absorption near-edge structure and valence state of Mn in (Ga,Mn)N
Abstract
The band structure of the diluted magnetic semiconductor (Ga,Mn)N, and the x-ray absorption near-edge structure (XANES) at the K edge of Mn, were calculated using the linearized augmented plane wave method. The calculated K-edge spectra fit well with experimental data obtained on samples of Ga1-xMnxN with a wide range of Mn content, from x=0.3% to 5.7%. These samples were grown by molecular beam epitaxy. X-ray diffraction measurements and extended x-ray absorption fine structure studies were used to confirm the wurtzite structure of the samples, the absence of any secondary phase, and the substitutional position of Mn in the gallium sublattice of GaN. The shape of the measured XANES spectra does not depend on the Mn content, implying the same valence state and local atomic structure around the Mn atom in all samples. The comparison between the measured spectra and the results of the ab initio calculation offers a clear interpretation of the preedge structure: It is mainly due to dipolar transitions, with a single peak in the case of Mn2+ and an additional peak for Mn3+. Such a behavior of the XANES preedge of Mn2+ was confirmed experimentally on Ga,MnAs and Zn,MnTe. We conclude that the valence state of Mn in wurtzite (Ga,Mn)N is 3+, a conclusion which is also supported by infrared optical transmission and magnetization data obtained on the same samples.