Journal
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
Volume 22, Issue 6, Pages 589-593Publisher
SPRINGER
DOI: 10.1007/s10948-009-0473-x
Keywords
FeAs high T-c superconducting multilayers; Iron pnictides; Heterostructure at the atomic limit; Microstrain; Out of plane effects; Ionic radius; Critical point; Cuprates
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The 3D phase diagram of iron pnictides where the critical temperature depends on charge density and microstrain in the active FeAs layers is proposed. The iron pnictides superconductors are shown to be a practical realization of a heterostructure at the atomic limit made of a superlattice of FeAs layers intercalated by spacer layers. We have focussed our interest on the A(1-x) B (x) Fe2As2 (122) families and we show that FeAs layers have a tensile microstrain due to the misfit strain between the active layers and the spacers. We have identified the critical range of doping and microstrain where the critical temperature gets amplified to its maximum value.
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