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artículo con referato
"Direct observation of the influence of the As-Fe-As angle on the Tc of superconducting SmFeAsO1-xFx"
G. Garbarino, R. Weht, A. Sow, A. Sulpice, P. Toulemonde, M. Álvarez-Murga, P. Strobel, P. Bouvier, M. Mezouar and M. Núñez-Regueiro
Phys. Rev. B 84(2) (2011) 024510/1-5
The electrical resistivity, crystalline structure, and electronic properties calculated from the experimentally measured atomic positions of the compound SmFeAsO0.81F0.19 have been studied up to pressures ~20 GPa. The correlation between the pressure dependence of the superconducting transition temperature (Tc) and crystallographic parameters on the same sample shows clearly that a regular FeAs4 tetrahedron maximizes Tc through optimization of carrier transfer to the FeAs planes as indicated by the evolution of the electronic band structures.
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