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Ab initio studies of structural, elastic, and electronic properties of RRh3BX (R=Sc, Y, La, and Ce)

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9 Author(s)
Kojima, Hidenobu ; Institute for Materials Research (IMR), Tohoku University, Aoba-ku, Sendai 980-8577, Japan ; Sahara, Ryoji ; Shishido, Toestu ; Nomura, A.
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The variations in the atomic and electronic structures as well as the elastic properties of perovskite-type RRh3BX (R=Sc, Y, La, and Ce) compounds are understood as a function of X in terms of the changes in the cohesive energy and the covalent and ionic bonding using ab initio calculations. A strong covalent bonding is obtained between B 2p and Rh 4d orbitals in all cases. For R=Ce, f-d hybridization is significant and the Fermi level lies in a pseudogap similar to the case where B is replaced by C, leading to further possibilities of designing such compounds.

Published in:
Applied Physics Letters  (Volume:91 ,  Issue: 8 )

Date of Publication: Aug 2007

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