Journal of Superconductivity and Novel Magnetism

, Volume 22, Issue 6, pp 589–593

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

  • Alessandro Ricci
  • Nicola Poccia
  • Gabriele Ciasca
  • Michela Fratini
  • Antonio Bianconi
Original Paper

DOI: 10.1007/s10948-009-0473-x

Cite this article as:
Ricci, A., Poccia, N., Ciasca, G. et al. J Supercond Nov Magn (2009) 22: 589. doi:10.1007/s10948-009-0473-x

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 A1−xBxFe2As2 (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.

Keywords

FeAs high Tc superconducting multilayersIron pnictidesHeterostructure at the atomic limitMicrostrainOut of plane effectsIonic radiusCritical pointCuprates

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Alessandro Ricci
    • 1
  • Nicola Poccia
    • 1
  • Gabriele Ciasca
    • 1
  • Michela Fratini
    • 1
  • Antonio Bianconi
    • 1
  1. 1.Department of PhysicsSapienza University of RomeRomeItaly