2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/211744We have made a phase-sensitive measurement on the corner junction of the iron-based superconductor BaFe1.8Co0.2As2, and observed the typical Fraunhofer-like diffraction pattern. The result suggests that there is no phase shift between the a-c face and b-c face of a crystal, which indicates that the superconducting wavefunction of the iron based superconductor is different from that of a cuprate superconductor.3 figures, 3 pagesSuperconductivityStrongly Correlated Electronstext