Year: 2024
Type: article
Abstract: Transverse thermoelectric power generation has emerged as a topic of immense interest in recent years owing to the orthogonal geometry which enables better scalability and fabrication of devices. Here, we investigate the thickness dependence of longitudinal and transverse responses in film-substrate systems, i.e., the Seebeck coefficient, the Hall coefficient, the Nernst coefficient, and the anomalous Nernst coefficient in a unified and general manner based on the circuit model, which describes the system as the parallel setup. By solving the parallel circuit model, we show that the transverse responses exhibit a significant peak, indicating the importance of a cooperative effect between the film and the substrate, arising from circulating currents that occur in these multilayer systems in the presence of a temperature gradient. Finally, on the basis of realistic material parameters, we predict that the Nernst effect in bismuth thin films on doped silicon substrates is boosted to unprecedented values if the thickness ratio is tuned accordingly, motivating experimental validation. Published by the American Physical Society 2024
Source: Physical Review Research
Institutions: The University of Tokyo, TU Wien
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,625
Awards: Anomalous Nernst Effect in Ferromagnetic Fe-Heusler Alloy Thin Film: Clarification of Beyond Boltzmann, Exploration of Thermoelectric Properties Beyond the Scope of Boltzmann Theory and Development of Innovative Solvers, Thermoelectric and thermomagnetic effect due to thermal phonon current: Clarification of beyond Boltzmann, G6459021381, G7794610745, G993602793
OpenAlex ID: W4403835024