Multigap superconductivity in sesquicarbides La${}_2$C${}_3$ and Y${}_2$C${}_3$

Abstract

A complex structure of the superconducting order parameter in $L{n}_2$C${}_3$ ($Ln$ = La, Y) is demonstrated by muon spin relaxation ($\mu$SR) measurements in their mixed state. The muon depolarization rate [${\sigma }_{\mathrm{v}}(T)$] exhibits a characteristic temperature dependence that can be perfectly described by a phenomenological double-gap model for nodeless superconductivity. While the magnitude of two gaps is similar between La${}_2$C${}_3$ and Y${}_2$C${}_3$, a significant difference in the interband coupling between those two cases is clearly observed in the behavior of ${\sigma }_{\mathrm{v}}(T)$.

5 pages, 4 figures

References in corpus (4)

• Strong electron-phonon coupling in the rare-earth carbide superconductor La2C3
• Multigap Superconductivity in Y${}_2$C${}_3$: A ${}^{13}$C-NMR Study
• Theory of Parity Violated Cooper Pairs in Weakly Noncentrosymmetric Superconductors
• Microscopic properties of vortex state in YB6 probed by muon spin rotation

Cited by in corpus (22)

• Nodeless superconductivity and time-reversal symmetry breaking in the noncentrosymmetric superconductor Re24Ti5
• Pressure effects on the unconventional superconductivity of the noncentrosymmetric LaNiC2
• Nodeless superconductivity and preserved time-reversal symmetry in the noncentrosymmetric Mo3P superconductor
• Type-I superconductivity in noncentrosymmetric superconductor AuBe
• Structure and superconductivity in the binary Re${}_{1-x}$Mo${}_x$ alloys
• Unconventional superconducting properties of noncentrosymmetric Re5.5Ta
• First-principles study of the superconductivity in LaO
• Imaginary phonon modes and phonon-mediated superconductivity in Y2C3
• Nodeless superconductivity in the centro- and noncentrosymmetric rhenium-boron superconductors
• Evidence of fully-gapped superconductivity in NbReSi: A combined $\mu$SR and NMR study
• Electronic structure, electron-phonon coupling and superconductivity in noncentrosymmetric ThCoC2 from ab initio calculations
• Superconducting properties of the noncentrosymmetric superconductor TaOs
• Superconductivity in noncentrosymmetric NbReSi investigated by muon spin rotation and relaxation
• Fully-gapped superconductivity and topological aspects of the noncentrosymmetric TaReSi superconductor
• Nodeless superconductivity in the noncentrosymmetric ThIrSi compound
• Spectroscopic evidence of multi-gap superconductivity in non-centrosymmetric AuBe
• ${}^{181}$Ta Nuclear quadrupole resonance study of non-centrosymmetric superconductor PbTaSe${}_2$
• Magnetic response of noncentrosymmetric superconductor La2C3: Effect of double-gap and spin-orbit interaction
• Multiband superconductivity in the topological Kramers nodal-line semimetals
• Probing the superconducting pairing of the La${}_4$Be${}_{33}$Pt${}_{16}$ alloy via muon-spin spectroscopy
• Two-gap superconductivity in the noncentrosymmetric La${}_3$Se${}_4$ compound
• NbReSi: A Noncentrosymetric Superconductor with Large Upper Critical Field