Detection of large thermal vibration for Cu atoms in tetrahedrite by high-angle annular dark-field imaging

Tetrahedrite (Cu12Sb4S13) is a new type of thermoelectric material with an extremely low thermal conductivity attributed to the anomalous large thermal vibration of specific Cu sites. The tetrahedrite crystal was observed from the [111] direction by high-angle annular dark-field (HAADF) imaging and...

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Bibliographic Details
Published in:Applied physics express 2017-04, Vol.10 (4), p.45601
Main Authors: Mishra, Tara Prasad, Koyano, Mikio, Oshima, Yoshifumi
Format: Article
Language:English
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Summary:Tetrahedrite (Cu12Sb4S13) is a new type of thermoelectric material with an extremely low thermal conductivity attributed to the anomalous large thermal vibration of specific Cu sites. The tetrahedrite crystal was observed from the [111] direction by high-angle annular dark-field (HAADF) imaging and the image intensity was found to be 64% lower at specific sites. This could be explained by the blurring of the intensity distribution owing to a large atomic displacement, suggesting that anomalous large thermal vibrations at specific sites in the crystal can be distinguished in HAADF images.
ISSN:1882-0778
1882-0786
DOI:10.7567/APEX.10.045601