Relation between Electronic Structure and Thermoelectric Properties of Heusler-Type Ru2VAl Compounds
Relation between Electronic Structure and Thermoelectric Properties of Heusler-Type Ru2VAl Compounds
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DOI：
10.3390/cryst12101403
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发表时间：
2022-10-01
期刊：
影响因子：
2.7
通讯作者：
Nishino, Yoichi
中科院分区：
文献类型：
--
作者：
Miyazaki, Hidetoshi;Kimura, Shin-ichi;Nishino, Yoichi
我们研究了 Heusler 型 Ru2VAl（下一代热电转换的候选材料），通过对其热电转换性能的第一原理计算以及利用光电发射和红外光谱对其电子结构的直接实验观察。我们的结果表明，与 Fe2VAl 相比，Ru2VAl 在费米能级附近具有更宽的赝能隙。因此，Ru2VAl在较高温度下有望具有更高的热电转换性能。
We investigated Heusler-type Ru2VAl, a candidate material for next-generation thermoelectric conversion, by first-principle calculations of its thermoelectric conversion properties and direct experimental observations of its electronic structures, employing photoemission and infrared spectroscopy. Our results show that Ru2VAl has a wider pseudogap near the Fermi level compared to Fe2VAl. Accordingly, a higher thermoelectric conversion performance can be expected in Ru2VAl at higher temperatures.