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Thermoelectric properties of DO3 V3Al using first principles calculations

机译:用第一性原理计算DO 3 V 3 Al的热电性能

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The structural, electronic, and thermoelectric properties of DO3 V3Al in the paramagnetic (PM) and antiferromagnetic (AF) phases are investigated using the semi-classical Boltzmann theory in combination with deformation potential theory from first-principles calculations. The structural results are consistent with other theoretical and experimental data. AF-DO3 V3Al is verified to be a gapless semiconductor. Based on the calculated relaxation time τ and lattice thermal conductivity κL, the thermoelectric properties of PM-DO3 and AF-DO3 V3Al have been predicted. Compared with PM-DO3 V3Al, the AF-DO3 phase exhibits favorable thermoelectric performance. The optimized thermoelectric figure of merit ZT of the p-type AF-DO3 phase can be as high as 0.32 at T = 500 K. It is possible to make V3Al a promising candidate for efficient thermoelectricity by reducing its thermal conductivity.
机译:DO 3 V 3 Al在顺磁(PM)和反铁磁中的结构,电子和热电性质(AF)相使用半经典Boltzmann理论与变形势理论结合第一原理计算进行研究。结构结果与其他理论和实验数据一致。验证了AF-DO 3 V 3 Al是无间隙半导体。基于计算的弛豫时间τ和晶格热导率κ L ,PM-DO的热电特性< small> 3 和AF-DO 3 V 3 Al已经被预测。与PM-DO 3 V 3 Al相比,AF-DO 3 < / sub> 相表现出良好的热电性能。 p型AF-DO 3 相的优化热电品质因数 ZT T <时可高达0.32 / em> = 500K。可以通过降低V 3 Al的热导率使其成为有效热电的有希望的候选者。

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