Relation between Electronic Structure and Thermoelectric Properties of Heusler-Type Ru2VAl Compounds
Hidetoshi Miyazaki, Shin‐ichi Kimura, Kensuke Onishi, Takehiko Hihara, Masato Yoshimura, Hirofumi Ishii, Masashi Mikami, Yoichi Nishino
Abstract
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.
Topics & Concepts
PseudogapThermoelectric effectMaterials scienceFermi levelCondensed matter physicsElectronic structurePhotoemission spectroscopyThermoelectric materialsHeusler compoundSeebeck coefficientAngle-resolved photoemission spectroscopyOptoelectronicsPhysicsDopingThermodynamicsX-ray photoelectron spectroscopyNuclear magnetic resonanceQuantum mechanicsElectronCuprateHeusler alloys: electronic and magnetic propertiesAdvanced Thermoelectric Materials and Devices2D Materials and Applications