Unusual Sensitivity of Superconductivity to Strain in Iron-Based 122 Superconductors

J. S. Kim, G. N. Tam, G. R. Stewart

Co-doped BaFe2As2 has been previously shown to have an unusually significant improvement of Tc (up to 2 K, or almost 10%) with annealing 1-2 weeks at 700 or 800 C, where such annea…