Disorder-driven electronic localization and phase separation in superconducting Fe1+yTe0.5Se0.5 single crystals

S. Rößler, Dona Cherian, S. Harikrishnan +6

We have investigated the influence of Fe-excess on the electrical transport and magnetism of Fe1+yTe0.5Se0.5 (y=0.04 and 0.09) single crystals. Both compositions exhibit resistivel…