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Role of atypical te...
Role of atypical temperature-responsive lattice thermal transport on the thermoelectric properties of antiperovskites Mg3XN (X = P, As, Sb, Bi)
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- Yue, Jincheng (författare)
- Ningbo Univ, Peoples R China
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- Liu, Yanhui (författare)
- Ningbo Univ, Peoples R China
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- Ren, Wenling (författare)
- Tech Univ Darmstadt, Germany
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- Lin, Shuyao (författare)
- Linköpings universitet,Institutionen för fysik, kemi och biologi,Tekniska fakulteten,Tech Univ Darmstadt, Germany; Tech Univ Wien, Austria
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- Shen, Chen (författare)
- Tech Univ Darmstadt, Germany
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- Singh, Harish Kumar (författare)
- Tech Univ Darmstadt, Germany
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- Cui, Tian (författare)
- Ningbo Univ, Peoples R China; Jilin Univ, Peoples R China
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- Tadano, Terumasa (författare)
- Natl Inst Mat & Sci, Japan
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- Zhang, Hongbin (författare)
- Tech Univ Darmstadt, Germany
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(creator_code:org_t)
- ELSEVIER, 2024
- 2024
- Engelska.
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Ingår i: Materials Today Physics. - : ELSEVIER. - 2542-5293. ; 41
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Antiperovskite materials have garnered significant attention due to their rich array of physical properties. In this study, we undertake a theoretical exploration into the phase stabilities, and the thermal and electronic transport properties of magnesium-based antiperovskite Mg3XN (X = P, As, Sb, and Bi) based on density functional theory (DFT) calculations, aiming at designing promising thermoelectric materials. The Mg3PN and Mg3AsN possess potential lattice distortion and strong quartic anharmonicity associated with the tilting displacement of Mg6N octahedra. After phonon renormalization, the thermal conductivity of Mg3PN and Mg3AsN exhibits relatively subdued temperature responsiveness with T-0.47 and T-0.62, respectively. Of note, the thermal conductivity of Mg3BiN drops the lowest at 900 K because of its distinctive rattle-dominated flat vibrational modes and strong temperature responsiveness with T-0.96, despite having a high initial value. Moreover, the combination of multiple degeneracy pockets and lighter dispersion band edges in Mg3XN ensures high Seebeck coefficient and impressive electronic conductivity, respectively. Ultimately, Mg3BiN achieves the optimal power factor, which also guarantees its excellent thermoelectric performance with the ZT values of 1.03 and 1.01 for n-type and ptype at 900 K, respectively. Our findings shed light on the significant impact of unconventional temperatureresponsive lattice thermal conductivity on thermoelectric materials for high-temperature applications.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- Antiperovskite; Four-phonon scattering; Self-consistent phonon theory; Thermoelectric properties; Anharmonic renormalization
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