Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 30, Issue 26, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-648X/aac742
Keywords
higher borides; crystal structure; electron-density distribution; charge transport anisotropy
Categories
Funding
- Federal Agency of Scientific Organizations [007-GZ/Ch3363/26]
- Russian Foundation for Basic Research [16-02-00171]
- Program of Fundamental Research of the Presidium of the Russian Academy of Sciences 'Fundamental Problems of High-Temperature Superconductivity'
- Russian Ministry of Education and Science
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High-quality single crystals of LuB12 are grown using the induction zone melting method. The x-ray data are collected at temperatures 293, 135, 95, 50K. The crystal structure of LuB12 can be refined with record low R-factor in the cubic Fm (3) over barm symmetry group despite reiterated observations of the cubic symmetry distortions both in the unit-cell values and in the physical properties. A peculiar computing strategy is developed to resolve this contradiction. True symmetry of the electron-density distribution in LuB12 is proved to be much lower than cubic as a result, which correlates very accurately with anisotropy of transport properties of LuB12.
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