Anisotropic magneto-Seebeck effect in the antiferromagnetic semimetal FeGe2
| Autor: | Tomoyuki Yokouchi, Minori Hashizume, Yuki Shiomi, Kurea Nakagawa |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Condensed matter physics Atmospheric temperature range Semimetal Computer Science::Other Magnetic field Condensed Matter::Materials Science Condensed Matter::Superconductivity Seebeck coefficient Thermoelectric effect Antiferromagnetism Condensed Matter::Strongly Correlated Electrons Anisotropy Sign (mathematics) |
| Zdroj: | Physical Review B. 104 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.104.115109 |
| Popis: | We have investigated thermoelectric properties of the antiferromagnetic semimetal $\mathrm{Fe}{\mathrm{Ge}}_{2}$. As temperature decreases from 340 K, the Seebeck coefficient takes a maximum around the N\'eel temperature and then decreases to show a sign change from positive to negative 50 K. When a strong magnetic field is applied perpendicular to the sample plane, the sign change disappears, and the positive Seebeck coefficient is observed in the whole temperature range. This large magneto-Seebeck effect is anisotropic since the Seebeck coefficient is insensitive to in-plane magnetic fields. Based on the Mott formula, we discuss the origins for this anisotropic magneto-Seebeck effect. |
| Databáze: | OpenAIRE |
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