Volume 107, Number 5, September 2014
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||08 September 2014|
New phases of binary compounds: CsCl-type RuGe and RuSn
1 Department of Applied Physics and Physico-Informatics, Keio University - 3-14-1 Hiyoshi, Yokohama 223-8522, Japan
2 Nanoscience and Nanotechnology Research Center, Osaka Prefecture University - 1-2 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8570, Japan
3 Japan Synchrotron Radiation Institute (JASRI) - 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
4 Comprehensive Research Organization for Science and Society Research Center for Neutron Science and Technology (CROSS), Research Center Neutron Science & Technology - Tokai, Ibaraki 3191106, Japan
5 Geodynamics Research Center (GRC), Ehime University - 4-5 Bunkyo-Cho, Matsuyama, Ehime 790-8577, Japan
Received: 31 May 2014
Accepted: 19 August 2014
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.
PACS: 61.05.cp – X-ray diffraction / 61.50.Ks – Crystallographic aspects of phase transformations; pressure effects / 31.15.-p – Calculations and mathematical techniques in atomic and molecular physics
© EPLA, 2014
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