Atomic-Level Characterization of Dynamics of Copper Ions in CuAgSe
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- 作者：Chenglong Shi ; Xuekui Xi ; Zhipeng Hou ; Enke Liu ; Wenhong Wang ; Shifeng Jin ; Yue Wu ; Guangheng Wu
- 刊名：Journal of Physical Chemistry C
- 出版年：2016
- 出版时间：February 18, 2016
- 年：2016
- 卷：120
- 期：6
- 页码：3229-3234
- 全文大小：409K
- ISSN：1932-7455
文摘
To examine the ionic migrations on atomic level in metal chalcogenide phonon glasses, 63Cu solid state nuclear magnetic resonance (NMR) spectroscopy was performed in an archetype CuAgSe compound. The observed characteristic motional narrowing effect in the superionic state provide clear evidence for the model of single ion-hopping instead of free-ion-like motion. We further find, for the first time, that thermal conductivity is strongly correlated with cation dynamics revealed by NMR within the range of temperatures investigated. This investigation provides better understanding how microscopic structure affects thermal transport properties which is of current interest in transition-metal chalcogenide based fast ion conductors.