| Autor: |
Qianheng Du, Lijun Wu, Huibo Cao, Chang-Jong Kang, Christie Nelson, Gheorghe Lucian Pascut, Tiglet Besara, Theo Siegrist, Kristjan Haule, Gabriel Kotliar, Igor Zaliznyak, Yimei Zhu, Cedomir Petrovic |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
npj Quantum Materials, Vol 6, Iss 1, Pp 1-7 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
2397-4648 |
| DOI: |
10.1038/s41535-020-00308-z |
| Popis: |
Abstract Iron diantimonide is a material with the highest known thermoelectric power. By combining scanning transmission electron microscopic study with electronic transport neutron, X-ray scattering, and first principle calculation, we identify atomic defects that control colossal thermopower magnitude and nanoprecipitate clusters with Sb vacancy ordering, which induce additional phonon scattering and substantially reduce thermal conductivity. Defects are found to cause rather weak but important monoclinic distortion of the unit cell P n n m → P m. The absence of Sb along [010] for high defect concentration forms conducting path due to Fe d orbital overlap. The connection between atomic defect anisotropy and colossal thermopower in FeSb2 paves the way for the understanding and tailoring of giant thermopower in related materials. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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