Two-band superconductivity featuring different anisotropies in the ternary iron silicide Lu${}_2$Fe${}_3$Si${}_5$

Abstract

We report detailed studies of the upper critical field and low-temperature specific heat in the two-gap superconductor Lu${}_2$Fe${}_3$Si${}_5$. The anisotropy of the upper critical field suggests that the active band is quasi-one-dimensional. Low-temperature specific heat in magnetic fields reveals that the virtual $H_{c2}$ in the passive band is almost isotropic. These results strongly indicate that the two bands have two different anisotropies, similar to the typical two-gap superconductor MgB${}_2$, and their interplay may be essential to the two-gap superconductivity in Lu${}_2$Fe${}_3$Si${}_5$.

5 pages, 5 figures

References in corpus (7)

• Unconventional pairing originating from disconnected Fermi surfaces in superconducting LaFeAsO${}_{1-x}$F${}_x$}
• LaFeAsO${}_{1-x}$F${}_x$: A low carrier density superconductor near itinerant magnetism
• Specific heat evidence for two-gap superconductivity in ternary-iron silicide Lu${}_2$Fe${}_3$Si${}_5$
• Lower Critical Fields of Superconducting PrFeAsO${}_{1-y}$ Single Crystals
• Two-gap superconductivity in single crystal Lu${}_2$Fe${}_3$Si${}_5$ from penetration depth measurements
• Uncommonly High Upper Critical Field in the Superconducting KOs${}_2$O${}_6$ Pyrochlore
• Disorder-sensitive superconductivity in the iron silicide Lu${}_2$Fe${}_3$Si${}_5$ studied by the Lu-site substitutions

Cited by in corpus (11)

• Topological $R$PdBi half-Heusler semimetals: a new family of non-centrosymmetric magnetic superconductors
• Nodeless superconductivity in the centro- and noncentrosymmetric rhenium-boron superconductors
• Multigap superconductivity in the Mo${}_5$PB${}_2$ boron-phosphorus compound
• Superconductivity of Electron-Doped NdOBiS2 by Substitution of Mixed-Valence Ce ions
• Nodeless superconductivity in the noncentrosymmetric ThIrSi compound
• The electronic structure of rare-earth iron silicide R2Fe3Si5 superconductors
• Time reversal invariant single gap superconductivity with upper critical field larger than Pauli limit in NbIr${}_2$B${}_2$
• Multiband superconductivity in the topological Kramers nodal-line semimetals
• Impact of Disorder on the Superconducting Properties and BCS-BEC Crossover in FeSe Single Crystals
• Evidence of unconventional pairing in the quasi two-dimensional CuIr${}_2$Te${}_4$ superconductor
• Phase-Space Approach to Wannier Pairing and Bogoliubov Orbitals in Square-Octagon Lattices