The Microstrain-Doping Phase Diagram of the Iron Pnictides Heterostructures at Atomic Limit

Abstract

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 BxFe2As2 (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.

5 pages, 3 figures

References in corpus (4)

• Superconductivity under high pressure in LaFeAsO
• A model for the phase separation controlled by doping and the internal chemical pressure in different cuprate superconductors
• Feshbach resonances and mesoscopic phase separation near a quantum critical point in multiband FeAs-based superconductors
• The Misfit Strain Critical Point in the 3D Phase Diagrams of Cuprates