Modeling the thermopower of icosahedral Al_(63)Cu_(25)Fe_(12) quasicrystals: spectral fine structure
On the basis of a realistic model for the spectral conductivity, obtained from a proper combination of tunneling spectroscopy [R. Escudero , J. Phys.: Condens. Matter 11, 383 (1999)] and transport measurements, we derive a closed analytical expression for the Seebeck coefficient, satisfactorily desc...
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2004 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/52113 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/52113 |
| Access Level: | acceso abierto |
| Palabra clave: | 538.9 Al-Cu-Fe Electronic transport-properties Thermoelectric properties Conductivity Alloys Phases Law Approximants Dependence Wiedemann Física de materiales Física del estado sólido 2211 Física del Estado Sólido |
| Sumario: | On the basis of a realistic model for the spectral conductivity, obtained from a proper combination of tunneling spectroscopy [R. Escudero , J. Phys.: Condens. Matter 11, 383 (1999)] and transport measurements, we derive a closed analytical expression for the Seebeck coefficient, satisfactorily describing its temperature dependence over a wide temperature range. The relative importance of thermal broadening effects and the temperature dependence of chemical potential in the thermopower curve is quantitatively discussed. By comparing the obtained analytical results with the experimental S(T) curve evidence for band structure effects in the thermopower is reported. |
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