Thermoelectricity on thin films
Seminário online do INCT de Materiais Quânticos Avançados com a Dra Mariana Lima (Thermophysical Properties and Functional Materials Group, IFUSP)
Em 23/06, 3ª feira, às 16h. Via ZOOM. Meeting ID: 867 1314 4498 | Passcode: 960803
This talk will be divided into three sections. In the first section, we will briefly introduce some concessions of thermoelectric materials: thermoelectric device, Seebeck effect, ZT and tradeoff relation. In the second, we discuss Mg2Sn thin films. Our results suggest that epitaxial nature is essential for achieving high mobility. Furthermore, we found that Ga incorporation influences the carrier concentration and acts as a phonon-scattering center. The optimal power factor and figure of merit values obtained were 1.49 x 10−3 W ·m−1 ·K−1 and 0.08 at 300 K for Mg2Sn0.97Ga0.03. The values are in the same range as the bulk material of Mg-based II–IV semiconductors, suggesting that the combination of doping and epitaxial nature in thin films can be a promising route for the miniaturization of thermoelectric devices based on Mg-based materials. In the third section, we discuss my first results in SnTe thin films. This section will be more focused on understanding the relation between topological and thermoelectric properties. In our first results, we found a formation of weak antilocalization (WAL) is independent of the carrier type. These results are significant for the scalable production of SnTe thin films and highlight their potential for thermoelectric and topological electronic applications.
References
[1] Mariana S. L. Lima, et al. Japanese Journal of Applied Physics, vol. 60,(2021).
[2]Mariana S. L. Lima, et al. Applied Physics Letters, vol. 119,( 2021).
[3] I. Ohkubo, M. Murata, A. Ohi, Mariana S. L. Lima, et al. Materials Today Energy, vol. 28, (2022)
[1] Mariana S. L. Lima, et al. Japanese Journal of Applied Physics, vol. 60,(2021).
[2]Mariana S. L. Lima, et al. Applied Physics Letters, vol. 119,( 2021).
[3] I. Ohkubo, M. Murata, A. Ohi, Mariana S. L. Lima, et al. Materials Today Energy, vol. 28, (2022)
A Professora Valentina Martelli (FEP - IFUSP) coordena o grupo de trabalho de Materiais Ferroelétricos e Multiferróicos do INCT de Materiais Quânticos Avançados. O INCT conta com a coordenação do pesquisador Eduardo Granado (UNICAMP).
Data do Evento:
23/06/2026 - 16:00
Data de Término:
23/06/2026 - 17:30
