| 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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Ramasse, Q. M.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2024Existence and role of low energy charge-paramagnon modes in the strange metal phase of Bi$_2$Sr$_2$CaCu$_2$O$_{8+y}$
- 2016The effect of substrate clamping on the paraelectric to antiferroelectric phase transition in Nd-doped BiFeO3 thin filmscitations
- 2016The effect of substrate clamping on the paraelectric to antiferroelectric phase transition in Nd-doped BiFeO 3 thin filmscitations
- 2015Mapping strain modulated electronic structure perturbations in mixed phase bismuth ferrite thin filmscitations
- 2015Crystal structure and thermoelectric properties of Sr-Mo substituted CaMnO3citations
- 2015Tuning Thermoelectric Properties of Misfit Layered Cobaltites by Chemically Induced Straincitations
- 2014Dielectric response of pentagonal defects in multilayer graphene nano-conescitations
- 2013Topologically induced confinement of collective modes in multilayer graphene nanocones measured by momentum-resolved STEM-VEELScitations
- 2012Quantum confinement of volume plasmons and interband transitions in germanium nanocrystalscitations
- 2011Microstructural analysis of interfaces in a ferromagnetic- multiferroic epitaxial heterostructurecitations
- 2011Chemistry of Ruddlesden-Popper planar faults at a ferroelectric-ferromagnet perovskite interfacecitations
- 2010Atomic configuration of planar defects in multiferroic Ca-doped BiFeO 3 filmscitations
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article
Tuning Thermoelectric Properties of Misfit Layered Cobaltites by Chemically Induced Strain
Abstract
<p>We have applied density functional theory and high-resolution transmission electron microscopy to investigate the relationship between chemically induced strain and charge transfer on the structural, electronic, vibrational, and thermoelectric properties of misfit layered cobaltites (M<sub>2</sub>CoO<sub>3</sub>)<sub>0.6</sub>CoO<sub>2</sub> (M = Mg, Ca, Sr, Ba). The electron and phonon density of states are analyzed and rationalized by accounting for the effects of internal strain and charge transfer, and lay the foundations to disentangle these effects on a promising thermoelectric oxide material. We found that the choice of different interlayer cations has little effect on the magnetic properties, but it generates internal strain between the rock-salt M<sub>2</sub>CoO<sub>3</sub> and hexagonal CoO<sub>2</sub> subsystems, changing the hybridization of the cations with the environment. Increasing the mass of the cation leads to decoupling of the vibrations between the rock-salt and CoO<sub>2</sub> subsystems so that heavier cations are predicted to enhance phonon scattering. On the other hand, applying compressive strain to the system, which corresponds to doping with smaller interlayer cations, is shown to enhance the Seebeck coefficient. The calculations suggest that thermoelectric efficiency of misfit layered cobaltites may be tuned by codoping the rock-salt layer with isovalent alkali earth cations.</p>