Two-band superconductivity featuring different anisotropies in the ternary iron silicide Lu<mml:mrow/>2Fe<mml:mrow/>3Si<mml:mrow/>5

2012/05/23 by Yasuyuki Nakajima, Y. Nakajima, H. Hidaka +8 · 1 citation
Materials Science · Mathematics · Physics and Astronomy · #Anisotropy #Band gap #Computer science #Condensed matter physics #Critical field #Field (mathematics) #Iron-based superconductors research #Isotropy #Magnetic field #Materials science #Mathematics #Metallurgy #Optics #Physics #Quantum mechanics #Rare-earth and actinide compounds #Silicide #Silicon #Superconductivity #Superconductivity in MgB2 and Alloys #Ternary operation #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.85.174524

published as Phys. Rev. B 85, 174524 (2012) · 5 pages, 5 figures

openalex publication_date 2012/05/23 · arxiv created 2012/07/06 · arxiv updated 2012/07/09 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We report detailed studies of the upper critical field and low-temperature specific heat in the two-gap superconductor Lu₂Fe₃Si₅. 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 MgB₂, and their interplay may be essential to the two-gap superconductivity in Lu₂Fe₃Si₅.

Citations

• Macroscopic anisotropy in superconductors with anisotropic gaps
• Pauli limiting of the upper critical magnetic field
• Transition Temperature of Strong-Coupled Superconductors
• Anisotropies of the Lower and Upper Critical Fields inMgB2Single Crystals

Cited by

• The electronic structure of rare-earth iron silicide R2Fe3Si5 superconductors