Physics – Condensed Matter – Superconductivity
Scientific paper
2010-06-11
Physics
Condensed Matter
Superconductivity
3pages, 2figures, 1table, proceedings of M2S 2009
Scientific paper
10.1016/j.physc.2009.10.099
Structural features of newly found perovskite-based iron pnictide oxide system have been systematically studied. Compared to REFePnO system, perovskite-based system tend to have lower Pn-Fe-Pn angle and higher pnictogen height owing to low electronegativity of alkaline earth metal and small repulsive force between pnictogen and oxygen atoms. As-Fe-As angles of (Fe2As2)(Sr4Cr2O6), (Fe2As2)(Sr4V2O6) and (Fe2Pn2)(Sr4MgTiO6) are close to ideal tetrahedron and those pnictogen heights of about 1.40 A are close to NdFeAsO with optimized carrier concentration. These structural features of this system may leads to realization of high Tc superconductivity.
Horii Shigeru
Katsura Yukari
Kawaguchi Noriyuki
Kishio Kohji
Matsumura Yoichiro
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