Abstract
We have discovered new phases of binary compounds of Ru and group-14 elements, CsCl-type cubic (Pm-3m) RuGe and RuSn. These materials are synthesized by heat treatment under high pressure, at more than 9.0 GPa for RuGe and 5.0 GPa for RuSn. Both polycrystalline samples exhibit metallic resistivity of . Pseudo-potential density functional theory calculations clarify that Ru 4d orbitals hybridized with Ge/Sn p orbitals dominantly form a Fermi surface. Calculated dynamic properties of these phases show the stability of the CsCl-type phases and the good agreement with the experimental results.
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