Disorder-sensitive superconductivity in the iron silicide Lu${}_2$Fe${}_3$Si${}_5$ studied by the Lu-site substitutions

Abstract

We studied effect of non-magnetic and magnetic impurities on superconductivity in Lu${}_2$Fe${}_3$Si${}_5$ by small amount substitution of the Lu site, which investigated structural, magnetic, and electrical properties of non-magnetic (Lu${}_{1-x}$Sc${}_x$)${}_2$Fe${}_3$Si${}_5$, (Lu${}_{1-x}$Y${}_x$)${}_2$Fe${}_3$Si${}_5$, and magnetic (Lu${}_{1-x}$Dy${}_x$)${}_2$Fe${}_3$Si${}_5$. The rapid depression of $T_c$ by non-magnetic impurities in accordance with the increase of residual resistivity reveals the strong pair breaking dominated by disorder. We provide compelling evidence for the sign reversal of the superconducting order parameter in Lu${}_2$Fe${}_3$Si${}_5$.

4 pages, 5 figures

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Cited by in corpus (9)

• Two-band superconductivity featuring different anisotropies in the ternary iron silicide Lu${}_2$Fe${}_3$Si${}_5$
• Enhanced quasiparticle heat conduction of the multigap superconductor Lu2Fe3Si5
• Superconductivity in iron silicide Lu2Fe3Si5 probed by radiation-induced disordering
• Electronic structure and Fermi surface of iron-based superconductors R2Fe3Si5 (R = Lu;Y;Sc) from first principles
• Specific Heat and Upper Critical Field of Sc5Ir4Si10 Superconductor
• The electronic structure of rare-earth iron silicide R2Fe3Si5 superconductors
• Room temperature charge density wave in a tetragonal polymorph of Gd2Os3Si5 and study of its origin in the RE2T3X5 (RE = Rare earth, T = transition metal, X = Si, Ge) series
• Prediction of inorganic superconductors with quasi-one-dimensional crystal structure
• Phase-Space Approach to Wannier Pairing and Bogoliubov Orbitals in Square-Octagon Lattices