References of "Hanna, MY"
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See detailInvestigation of electron and phonon transport in Bi-doped CaMnO3 for thermoelectric applications
Suprayoga, E; Putri, WBK; Singsoog, K et al

in Materials Research Bulletin (2021), 141

The electron and phonon transports in CaMnO3 and in one of its Bi-doped counterparts, namely, Bi0.03Ca0.97MnO3, are investigated using the thermoelectric transport measurements and first-principles ... [more ▼]

The electron and phonon transports in CaMnO3 and in one of its Bi-doped counterparts, namely, Bi0.03Ca0.97MnO3, are investigated using the thermoelectric transport measurements and first-principles calculations. We find that antiferromagnetic insulator CaMnO3 breaks the Wiedemann–Franz law with the Lorenz number reaching four times that of ordinary metals at room temperature. Bismuth doping reduces both the electrical resistivity and Seebeck coefficient of CaMnO3; thus, it recovers the Wiedemann–Franz law behavior. In addition, Bi0.03Ca0.97MnO3 possesses a shorter phonon lifetime according to the transport measurements. As a result, Bi0.03Ca0.97MnO3 exhibits superior thermoelectric properties over pristine CaMnO3 owing to the lower thermal conductivity and electrical resistivity. [less ▲]

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See detailThermoelectric properties of two-dimensional hydrogenated borophene: A first-principles study
Hanna, M.Y.; Hasdeo, Eddwi Hesky UL; Suprayoga, E. et al

in AIP Conference Proceedings (2020), 2256(1), 030017

We theoretically study electronic and thermoelectric properties of two-dimensional hydrogenated borophene (”boro-phane”). We show that, according to the first-principles calculation, hydrogenated ... [more ▼]

We theoretically study electronic and thermoelectric properties of two-dimensional hydrogenated borophene (”boro-phane”). We show that, according to the first-principles calculation, hydrogenated borophene is semimetallic, with two bands meeting at a single point at the Fermi level. The thermoelectric properties evaluated by using the Boltzmann equation with a constant relaxation time approximation (CRTA). At room temperature, we obtain large power factor for electron doping regime. Therefore, appropriate doping to this material can enhance its thermoelectric efficiency. [less ▲]

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See detailThermoelectric properties of Mexican-hat band structures
Nurhuda, M; Nugraha, ART; Hanna, MY et al

in Advances in Natural Sciences: Nanoscience and Nanotechnology (2020), 11(1), 015012

Materials with Mexican-hat electronic energy dispersions emerging from heterostructures, substrate effects, or spin–orbit couplings are believed to exhibit excellent thermoelectric properties due to its ... [more ▼]

Materials with Mexican-hat electronic energy dispersions emerging from heterostructures, substrate effects, or spin–orbit couplings are believed to exhibit excellent thermoelectric properties due to its van Hove singularity of density of states in two-dimension. However, within a constant relaxation time approximation, we disprove this belief and we find that the singularity effect is cancelled down by the group velocity contribution in the thermoelectric transport distribution. Nevertheless, the band parameters can still be optimised to reach thermoelectric figure of merit larger than 2 in a wide bandwidth, thus keeping the potential of materials with Mexican-hat bands for thermoelectric applications. [less ▲]

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See detailThermoelectric properties of Mexican-hat band structures
Nurhuda, M; Nugraha, ART; Hanna, MY et al

in Advances in Natural Sciences: Nanoscience and Nanotechnology (2020), 11(1), 015012

Materials with Mexican-hat electronic energy dispersions emerging from heterostructures, substrate effects, or spin–orbit couplings are believed to exhibit excellent thermoelectric properties due to its ... [more ▼]

Materials with Mexican-hat electronic energy dispersions emerging from heterostructures, substrate effects, or spin–orbit couplings are believed to exhibit excellent thermoelectric properties due to its van Hove singularity of density of states in two-dimension. However, within a constant relaxation time approximation, we disprove this belief and we find that the singularity effect is cancelled down by the group velocity contribution in the thermoelectric transport distribution. Nevertheless, the band parameters can still be optimised to reach thermoelectric figure of merit larger than 2 in a wide bandwidth, thus keeping the potential of materials with Mexican-hat bands for thermoelectric applications. [less ▲]

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