论文标题
压力诱导的平面在Cu $ _ {10} $ zn $ _ {2} $ sb $ _ {4} $ s $ _ {13} $通过特定 - 热和X射线衍射测量研究
Pressure induced quenching of planar rattling in Cu$_{10}$Zn$_{2}$Sb$_{4}$S$_{13}$ studied by specific-heat and x-ray diffraction measurements
论文作者
论文摘要
我们已经研究了对四面体的嘎嘎作用的压力效应通过特定的热量和X射线衍射测量。通过施加压力$ p $，CZSS的嘎嘎作用最初会减少，并以$ P $ $ \ textgreater $ 1 $ 1 $ GPA的价格急剧增加。相比之下，BGS的能量以$ P $最高6.5 GPA的形式单调增加。对压力依赖的特异性热和X射线衍射的分析表明，S $ _ {3} $ CZS中的Cu原子的平面外嘎嘎声源于CZSS的三角形，与BGS超大箱中偏心站点之间BA离子的嘎嘎作响不同。 CZSS中的嘎嘎声在进一步增加$ p $以上的GPA之上停止，这表明Cu原子逃离了S $ _ {3} $三角形平面。
We have studied the pressure effect on the rattling of tetrahedrite Cu$_{10}$Zn$_{2}$Sb$_{4}$S$_{13\,}$(CZSS) and type-I clathrate Ba$_{8}$Ga$_{16}$Sn$_{30\,}$(BGS) by specific heat and x-ray diffraction measurements. By applying pressure $P$, the rattling energy for CZSS initially decreases and steeply increases for $P$ $\textgreater$ $1$ GPa. By contrast, the energy for BGS increases monotonically with $P$ up to 6.5 GPa. An analysis of the pressure dependent specific heat and x-ray diffraction indicates that the out-of-plane rattling of the Cu atoms in the S$_{3}$ triangle of CZSS originates from the chemical pressure, unlike the rattling of the Ba ions among off-center sites in an oversized cage of BGS. The rattling in CZSS ceases upon further increasing $P$ above 2 GPa, suggesting that Cu atoms escape away from the S$_{3}$ triangle plane.
