DOAJ Open Access 2021

Vacancy defect control of colossal thermopower in FeSb2

Qianheng Du Lijun Wu Huibo Cao Chang-Jong Kang Christie Nelson +8 lainnya

Abstrak

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.

Topik & Kata Kunci

Materials of engineering and construction. Mechanics of materials Atomic physics. Constitution and properties of matter

Penulis (13)

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

Format Sitasi

APA MLA BibTeX

Du, Q., Wu, L., Cao, H., Kang, C., Nelson, C., Pascut, G.L. et al. (2021). Vacancy defect control of colossal thermopower in FeSb2. https://doi.org/10.1038/s41535-020-00308-z

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Informasi Jurnal

Tahun Terbit: 2021
Sumber Database: DOAJ
DOI: 10.1038/s41535-020-00308-z
Akses: Open Access ✓