| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloys and Compounds for Thermoelectric and Solar Cell Applications XI
|
| Presentation Title |
Doping as a Tuning Mechanism for Magneto-thermoelectric Effects to Improve zT in Weyl Semimetals |
| Author(s) |
Sarah J. Watzman |
| On-Site Speaker (Planned) |
Sarah J. Watzman |
| Abstract Scope |
Weyl semimetals combine topological and semimetallic effects, making them interesting candidates for thermoelectric transport. Experimental results in polycrystalline NbP demonstrate the simultaneous existence of a large Nernst and magneto-Seebeck effect, which is typically not observed in a single material at the same temperature. We compare transport results among differing samples of NbP, observing a shift in the temperature at which the maximum Nernst and magneto-Seebeck thermopowers occur. Theoretical modeling shows doping strongly alters both the Seebeck and Nernst magneto-thermopowers by shifting the temperature-dependent chemical potential. Thus, we offer doping as a tuning mechanism for shifting magneto-thermoelectric effects to temperatures appropriate for device applications, improving zT at desirable operating temperatures. Furthermore, the simultaneous presence of both a large Nernst and magneto-Seebeck thermopower is uncommon and offers unique device advantages if the thermopowers are used additively. Thus, we propose a thermoelectric device which would collectively harness the large Nernst and magneto-Seebeck thermopowers. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Other, Other |