Survey of electronic properties and local structures around Fe in selected multinary chalcogenides
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2019
Authors
Radisavljević, IvanaNovaković, Nikola
Mahnke, Heinz-Eberhard
Andrić, Velibor
Kurko, Sandra V.
Milivojević, Dušan
Romčević, Nebojša Ž.
Ivanović, Nenad
Article (Published version)
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© 2018 Elsevier B.V.
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Paper presents detailed studies of local and electronic structure around Fe in Cd0.97Fe0.03Te, Cd0.98Fe0.02Te0.97Se0.03 and Cd0.99Fe0.01Te0.91S0.09 multinary chalcogenides by means of X–ray absorption fine structure (XAFS), X–ray magnetic circular dichroism (XMCD) and electron paramagnetic resonance (EPR) measurements. In addition, electronic consequences of Fe incorporation into CdTe semiconductor host were studied by means of first principles calculations. In order to improve accuracy of the calculated total energies, the band gaps and the band edge positions, special attention is paid to the treatment of exchange–correlation interaction and the description of highly localized Fe 3d–states. Also, the Bader theory of the topological properties of the electron charge density is used to access details of the nature, strength and distribution of the (next) nearest neighbour bonds. Local and electronic structure around Fe in Cd0.97Fe0.03Te and Cd0.98Fe0.02Te0.97Se0.03 systems have been fo...und to exhibit similar characteristics, since the first coordination sphere around Fe comprises four Te atoms located at approximately the same distance. In Cd0.99Fe0.01Te0.91S0.09 system, however, local bimodal distribution of distances has been revealed, with one Fe–Te bond replaced with much shorter Fe–S bond, resulting in much stronger crystal–field. Along with the crystal field effect, the spin–orbit interaction has proven to play decisive role in determining the nature of Fe doped CdTe systems. While the systems with higher Fe concentrations (25 at.%) are intrinsic insulators, in systems with only 3.125 at.% Fe one spin channel contributes to the density of states at the Fermi level, which makes them suitable for spin selective electronic transport applications. © 2018 Elsevier B.V.
Keywords:
Impurities in semiconductors / Electronic properties / EXAFS / Electronic band structureSource:
Journal of Alloys and Compounds, 2019, 782, 160-169Funding / projects:
- ELISA - European Light Sources Activities - Synchrotrons and Free Electron Lasers (EU-FP7-226716)
- Optoelectronics nanodimension systems - the rout towards applications (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45003)
DOI: 10.1016/j.jallcom.2018.12.167
ISSN: 0925-8388
WoS: 000458608600017
Scopus: 2-s2.0-85058522727
Institution/Community
VinčaTY - JOUR AU - Radisavljević, Ivana AU - Novaković, Nikola AU - Mahnke, Heinz-Eberhard AU - Andrić, Velibor AU - Kurko, Sandra V. AU - Milivojević, Dušan AU - Romčević, Nebojša Ž. AU - Ivanović, Nenad PY - 2019 UR - https://vinar.vin.bg.ac.rs/handle/123456789/8004 AB - Paper presents detailed studies of local and electronic structure around Fe in Cd0.97Fe0.03Te, Cd0.98Fe0.02Te0.97Se0.03 and Cd0.99Fe0.01Te0.91S0.09 multinary chalcogenides by means of X–ray absorption fine structure (XAFS), X–ray magnetic circular dichroism (XMCD) and electron paramagnetic resonance (EPR) measurements. In addition, electronic consequences of Fe incorporation into CdTe semiconductor host were studied by means of first principles calculations. In order to improve accuracy of the calculated total energies, the band gaps and the band edge positions, special attention is paid to the treatment of exchange–correlation interaction and the description of highly localized Fe 3d–states. Also, the Bader theory of the topological properties of the electron charge density is used to access details of the nature, strength and distribution of the (next) nearest neighbour bonds. Local and electronic structure around Fe in Cd0.97Fe0.03Te and Cd0.98Fe0.02Te0.97Se0.03 systems have been found to exhibit similar characteristics, since the first coordination sphere around Fe comprises four Te atoms located at approximately the same distance. In Cd0.99Fe0.01Te0.91S0.09 system, however, local bimodal distribution of distances has been revealed, with one Fe–Te bond replaced with much shorter Fe–S bond, resulting in much stronger crystal–field. Along with the crystal field effect, the spin–orbit interaction has proven to play decisive role in determining the nature of Fe doped CdTe systems. While the systems with higher Fe concentrations (25 at.%) are intrinsic insulators, in systems with only 3.125 at.% Fe one spin channel contributes to the density of states at the Fermi level, which makes them suitable for spin selective electronic transport applications. © 2018 Elsevier B.V. T2 - Journal of Alloys and Compounds T1 - Survey of electronic properties and local structures around Fe in selected multinary chalcogenides VL - 782 SP - 160 EP - 169 DO - 10.1016/j.jallcom.2018.12.167 ER -
@article{ author = "Radisavljević, Ivana and Novaković, Nikola and Mahnke, Heinz-Eberhard and Andrić, Velibor and Kurko, Sandra V. and Milivojević, Dušan and Romčević, Nebojša Ž. and Ivanović, Nenad", year = "2019", abstract = "Paper presents detailed studies of local and electronic structure around Fe in Cd0.97Fe0.03Te, Cd0.98Fe0.02Te0.97Se0.03 and Cd0.99Fe0.01Te0.91S0.09 multinary chalcogenides by means of X–ray absorption fine structure (XAFS), X–ray magnetic circular dichroism (XMCD) and electron paramagnetic resonance (EPR) measurements. In addition, electronic consequences of Fe incorporation into CdTe semiconductor host were studied by means of first principles calculations. In order to improve accuracy of the calculated total energies, the band gaps and the band edge positions, special attention is paid to the treatment of exchange–correlation interaction and the description of highly localized Fe 3d–states. Also, the Bader theory of the topological properties of the electron charge density is used to access details of the nature, strength and distribution of the (next) nearest neighbour bonds. Local and electronic structure around Fe in Cd0.97Fe0.03Te and Cd0.98Fe0.02Te0.97Se0.03 systems have been found to exhibit similar characteristics, since the first coordination sphere around Fe comprises four Te atoms located at approximately the same distance. In Cd0.99Fe0.01Te0.91S0.09 system, however, local bimodal distribution of distances has been revealed, with one Fe–Te bond replaced with much shorter Fe–S bond, resulting in much stronger crystal–field. Along with the crystal field effect, the spin–orbit interaction has proven to play decisive role in determining the nature of Fe doped CdTe systems. While the systems with higher Fe concentrations (25 at.%) are intrinsic insulators, in systems with only 3.125 at.% Fe one spin channel contributes to the density of states at the Fermi level, which makes them suitable for spin selective electronic transport applications. © 2018 Elsevier B.V.", journal = "Journal of Alloys and Compounds", title = "Survey of electronic properties and local structures around Fe in selected multinary chalcogenides", volume = "782", pages = "160-169", doi = "10.1016/j.jallcom.2018.12.167" }
Radisavljević, I., Novaković, N., Mahnke, H., Andrić, V., Kurko, S. V., Milivojević, D., Romčević, N. Ž.,& Ivanović, N.. (2019). Survey of electronic properties and local structures around Fe in selected multinary chalcogenides. in Journal of Alloys and Compounds, 782, 160-169. https://doi.org/10.1016/j.jallcom.2018.12.167
Radisavljević I, Novaković N, Mahnke H, Andrić V, Kurko SV, Milivojević D, Romčević NŽ, Ivanović N. Survey of electronic properties and local structures around Fe in selected multinary chalcogenides. in Journal of Alloys and Compounds. 2019;782:160-169. doi:10.1016/j.jallcom.2018.12.167 .
Radisavljević, Ivana, Novaković, Nikola, Mahnke, Heinz-Eberhard, Andrić, Velibor, Kurko, Sandra V., Milivojević, Dušan, Romčević, Nebojša Ž., Ivanović, Nenad, "Survey of electronic properties and local structures around Fe in selected multinary chalcogenides" in Journal of Alloys and Compounds, 782 (2019):160-169, https://doi.org/10.1016/j.jallcom.2018.12.167 . .