Detection of large thermal vibration for Cu atoms in tetrahedrite by high-angle annular dark-field imaging
Detection of large thermal vibration for Cu atoms in tetrahedrite by high-angle annular dark-field imaging
复制标题
DOI：
10.7567/apex.10.045601
复制
发表时间：
2017-03
影响因子：
2.3
通讯作者：
Tara P. Mishra;M. Koyano;Y. Oshima
中科院分区：
文献类型：
--
作者：
Tara P. Mishra;M. Koyano;Y. Oshima
黝铜矿（Cu12Sb4S13）是一种新型的热电材料，由于特定Cu位的异常大的热振动而具有极低的热导率。通过高角度环形暗场（HAADF）成像从[111]方向观察黝铜矿晶体，发现在特定位点处的图像强度低64%。这可以通过由于大的原子位移而导致的强度分布的模糊来解释，这表明可以在HAADF图像中区分晶体中特定位置处的异常大的热振动。
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.