arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2009.05196cond-mat.mtrl-sci
收藏

用specific-heat和X射线衍射研究Cu $_{10}$ Zn PDMATHAAB Sb PDMATHAAC S $_{13}$的压致淬火

Pressure induced quenching of planar rattling in Cu$_{10}$Zn$_{2}$Sb$_{4}$S$_{13}$ studied by specific-heat and x-ray diffraction measurements

Kazunori Umeo, Koichiro Suekuni, Toshiro Takabatake, Eiji Nishibori

摘要:

本文用比热和X射线衍射方法研究了压力对黝铜矿Cu $_{10}$ Zn $_{2}$ Sb $_{4}$ S $_{13\,}$(CZSS)和Ⅰ型包合物Ba $_{8}$ Ga $_{16}$ Sn $_{30\,}$(BGS)振动的影响。通过施加压力$P$,CZSS的拍击能量最初减小,并且对于$P$ $\textgreater$ $1$ GPa急剧增加。相比之下,BGS的能量随着$P$单调增加到6.5 GPa。压力依赖的比热和X射线衍射的分析表明,在CZSS的S $_{3}$三角形的Cu原子的面外的嘎嘎声源于化学压力,不同于在一个超大的笼BGS的偏心位置之间的Ba离子的嘎嘎声。当$P$进一步增加到2 GPa以上时,CZSS中的嘎嘎声停止,这表明铜原子逃离了S $_{3}$三角平面。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑