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

doi:10.1103/PhysRevB.102.100302

paper

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

arXiv:2009.05196 · doi:10.1103/PhysRevB.102.100302

Abstract

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.

16 pages, 3 figures, 1 table

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

Abstract

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Pressure induced quenching of planar rattling in Cu10​Zn2​Sb4​S13​ studied by specific-heat and x-ray diffraction measurements

Abstract

References in corpus (2)

Cited by in corpus (2)

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