Neutron diffraction study on the lattice of thermoelectric material Ag8SnSe6
Ag8SnSe6 compounds are a group of promising thermoelectric materials. One main feature of this material as thermoelectric candidate is the ultra-low thermal conductivity. One possible reason is the weak bonding of Ag ions and complex unit cell. Another explanation is the liquid phonon behavior above the phase transition around 350 K. In our previous experiment, we have studied the cubic structure above the phase transition temperature, and found a quasi-liquid phonon behavior. In this proposal, we would like to study the structure below and around the phase transition temperature. This results would be helpful to understand the relationship between the thermal conductivity, structures and phase transitions in the Ag8SnSe6.
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REN Qingyong; FABELO ROSA Oscar Ramon; RENZY Dimitri; RODRIGUEZ VELAMAZAN Jose Alberto; Yixi Su; WU Jiangtao and ZHU Fengfeng. (2019). Neutron diffraction study on the lattice of thermoelectric material Ag8SnSe6. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-14-268
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