Local quasiparticle density of states of superconducting SmFeAsO$1-x$F$x$ single crystals: Evidence for spin-mediated pairing

Y. Fasano, I. Maggio-Aprile, N. D. Zhigadlo +3

We probe the local quasiparticles density-of-states in micron-sized SmFeAsO${}_{1-x}$F${}_x$ single-crystals by means of Scanning Tunnelling Spectroscopy. Spectral features resemble…