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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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Hasdeo, Eddwi Hesky
University of Luxembourg
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2022Thermoelectric properties of semiconducting materials with parabolic and pudding-mold band structurescitations
- 2021Effects of topological band structure on thermoelectric transport of bismuthenecitations
- 2021A Comparative Study of Thermoelectric Properties of Monolayer, Bilayer and Bulk CrI3
- 2021Investigation of electron and phonon transport in Bi-doped CaMnO3 for thermoelectric applicationscitations
- 2021Non-universal Scaling of Thermoelectric Efficiency in 3D and 2D Thermoelectric Semiconductorscitations
- 2021Kerr effect in tilted nodal loop semimetalscitations
- 2020Non-universal Scaling of Thermoelectric Efficiency in 3D and 2D Thermoelectric Semiconductors
- 2020Characterization of electron and phonon transports in Bi-doped CaMnO3 for thermoelectric applications
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document
Characterization of electron and phonon transports in Bi-doped CaMnO3 for thermoelectric applications
Abstract
Electron and phonon transports in CaMnO3 and its Bi-doped counterpart, Bi0.03Ca0.97MnO3, are investigated by thermoelectric transport measurements, Raman spectroscopy, and first-principles calculations. In particular, we focus on CaMnO3 and Bi0.03Ca0.97MnO3's electronic structures, temperature-dependent electron and phonon lifetimes, and their sound velocities. We find that the anti-ferromagnetic insulator CaMnO3 breaks the Wiedemann-Franz (WF) law with the Lorenz number reaching four times that of ordinary metals at room temperature. Bismuth doping reduces both the electrical resistivity and the Seebeck coefficient of CaMnO3, thus it recovers the WF law behavior. Raman spectroscopy confirms that Bi0.03Ca0.97MnO3 has a lower Debye frequency as well as a shorter phonon lifetime. As a result, Bi0.03Ca0.97MnO3 exhibits superior thermoelectric properties over the pristine CaMnO3 due to the lower thermal conductivity and electronic resistivity. ; Comment: 7 pages, 7 figures