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IMAGE: (Left) Through neutron scattering experiments, scientists observed distinct patterns of magnetic correlations in superconducting ( single-stripe magnetism ) and nonsuperconducting ( double-stripe magnetism ) samples of a compound containing iron (Fe), tellurium (Te), and. view more
Credit: Brookhaven National Laboratory
UPTON, NY Scientists characterized how the electronic states in a compound containing iron, tellurium, and selenium depend on local chemical concentrations. They discovered that superconductivity (conducting electricity without resistance), along with distinct magnetic correlations, appears when the local concentration of iron is sufficiently low; a coexisting electronic state existing only at the surface (topological surface state) arises when the concentration of tellurium is sufficiently high. Reported in