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arxiv: 1202.5956 · v3 · pith:BSQTIIH4new · submitted 2012-02-27 · ❄️ cond-mat.str-el · cond-mat.supr-con

Nanoscale textured superconductivity in Ru-substituted BaFe2As2 : a challenge to a universal phase diagram for the pnictides

Yannis Laplace , Julien Bobroff , Veronique Brouet , Gaston Collin , Florence Rullier-Albenque , Dorothee Colson , Anne Forget This is my paper
classification ❄️ cond-mat.str-el cond-mat.supr-con
keywords diagrammagneticnanoscaleorderphasesubstitutionsuperconductivityantiferromagnetic
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75As NMR experiments were performed in Ba(Fe1-xRux)2As2 for x=0 to 80%. Magnetic fractions and NMR lineshapes demonstrate that Ru substitution destroys the antiferromagnetic (AF) order inhomogeneously with a magnetic moment distributed from 0.9 to 0 uB. Superconductivity emerges at intermediate Ru doping and coexists with AF order only in the regions where moments are smaller than ~0.3uB, resulting in an original nanoscale texture. This situation contrasts with that of Co substitution, challenging the apparent universality of the phase diagram in Fe-based superconductors.

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