Thermoelectric figure of merit of AlPdRe icosahedral quasicrystals: composition-dependent effects
In this work we present a theoretical study on the composition dependence of the thermoelectric figure of merit (ZT) of icosahedral AlPdRe quasicrystals. From our study we conclude that band-structure effects play a significant role in determining the thermoelectric performance of these alloys. By c...
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| Formato: | artículo |
| Fecha de publicación: | 2004 |
| País: | España |
| Recursos: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/52112 |
| Acesso em linha: | https://hdl.handle.net/20.500.14352/52112 |
| Access Level: | acceso abierto |
| Palavra-chave: | 538.9 Al-Cu-Fe Statistical-mechanical theory Metal-insulator-transition Electronic transport Thermal-conductivity Irreversible processes Power-generation I-Alpdre Re-Pd Alloys Física del estado sólido Física matemática 2211 Física del Estado Sólido |
| Resumo: | In this work we present a theoretical study on the composition dependence of the thermoelectric figure of merit (ZT) of icosahedral AlPdRe quasicrystals. From our study we conclude that band-structure effects play a significant role in determining the thermoelectric performance of these alloys. By comparing our analytical results with available experimental data of transport coefficients we discuss the most appropriate stoichiometries for thermoelectric applications, concluding that (i) those samples whose Fermi level is located at the pseudogap's minimum exhibit very small ZT values, and (ii) relatively large ZT values are expected for those samples exhibiting narrow features in the density of states close to the Fermi level. |
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