Absolute Seebeck coefficient of thin platinum films
| Autor: | Saskia F. Fischer, Stefan Kowarik, R. Mitdank, M. Kockert, Anton Zykov |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Electron mean free path
Materials science FOS: Physical sciences General Physics and Astronomy chemistry.chemical_element Applied Physics (physics.app-ph) 02 engineering and technology 01 natural sciences Condensed Matter::Materials Science Electrical resistivity and conductivity Condensed Matter::Superconductivity Seebeck coefficient Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Thermoelectric effect Phonon drag 010302 applied physics Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Scattering Physics - Applied Physics 021001 nanoscience & nanotechnology Grain size chemistry 0210 nano-technology Platinum |
| Popis: | The influence of size effects on the thermoelectric properties of thin platinum films is investigated and compared to the bulk. Structural properties, like the film thickness and the grain size, are varied. We correlate the electron mean free path with the temperature dependence of the electrical conductivity and the absolute Seebeck coefficient $S_{\text{Pt}}$ of platinum. We use a measurement platform as a standardized method to determine $S_{\text{Pt}}$ and show that $S_{\text{Pt,film}}$ is reduced compared to $S_{\text{Pt,bulk}}$. Boundary and surface scattering reduce the thermodiffusion and the phonon drag contribution to $S_{\text{Pt,film}}$ by nearly the same factor. A detailed discussion and a model to describe the temperature dependence of the absolute Seebeck coefficient and the influence of size effects of electron-phonon and phonon-phonon interaction on $S_{\text{Pt}}$ is given. |
| Databáze: | OpenAIRE |
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