Yu-Shiba-Rusinov (YSR) bound states appear when a magnetic atom interacts with superconductor. Here, we report on spin-resolved spectroscopic studies of YSR related Fe atoms deposited the surface topological superconductor FeTe0.55Se0.45 using spin-polarized scanning tunneling microscope. We clearly identify spin signature pairs at finite energies within superconducting gap having opposite pola...

This work presents the evolution of magnetic properties Eu x Ca 1− Fe 2 As (0 ≤ 1, ECFA) samples. Unlike resistivity data, that for susceptibility χ (T) does not show any clear evidence spin density wave (SDW) transition. When Curie-Weiss contribution is subtracted, a weak anomaly appears at temperature close to SDW transition ( T ) determined from data. To understand orders arising Fe-moments ...

Importance of electronic correlations for structural and magnetic properties of the iron pnictide superconductor We present calculations of structural and magnetic properties of the iron-pnictide superconductor LaFeAsO including electron-electron correlations. For this purpose we apply a fully charge self-consistent combination of density-functional theory with the dynamical mean-field theory, ...

The optical properties of the iron-chalcogenide superconductor K0.8Fe2−ySe2 with a critical temperature Tc = 31 K have been measured over a wide frequency range in the ab planes above and below Tc. The conductivity is incoherent at room temperature but becomes coherent (Drude-like) at T Tc; however, R 320 k , well above the threshold for the superconductor-insulator transition atR = h/4e2 6.9 k...

superconducting materials are capable of trapping extremely high magnetic fields. this property and meissner effect of superconductors causes a levitation force between bulk superconductors and a permanent magnet (pm). this levitation force has possible industrial applications such as permanent magnet guideways (pmg). because of the high price of permanent magnets, the optimization of pmg desig...