Nodeless superconductivity in the noncentrosymmetric Mo${}_3$Rh${}_2$N superconductor: a $\mu$SR study

Abstract

The noncentrosymmetric superconductor Mo${}_3$Rh${}_2$N, with $T_c=4.6$ K, adopts a $\beta$-Mn-type structure (space group $P$4${}_1$32), similar to that of Mo${}_3$Al${}_2$C. Its bulk superconductivity was characterized by magnetization and heat-capacity measurements, while its microscopic electronic properties were investigated by means of muon-spin rotation and relaxation ($\mu$SR). The low-temperature superfluid density, measured via transverse-field (TF)-$\mu$SR, evidences a fully-gapped superconducting state with ${\Delta }_0=1.73k_{\mathrm{B}}{T}_c$, very close to 1.76 $k_{\mathrm{B}}{T}_c$ - the BCS gap value for the weak coupling case, and a magnetic penetration depth ${\lambda }_0=586$ nm. The absence of spontaneous magnetic fields below the onset of superconductivity, as determined by zero-field (ZF)-$\mu$SR measurements, hints at a preserved time-reversal symmetry in the superconducting state. Both TF-and ZF-$\mu$SR results evidence a spin-singlet pairing in Mo${}_3$Rh${}_2$N.

arXiv comment5 figures and 5 pages. Accepted for publication as a Rapid Communication in Phys. Rev. B

References in corpus (19)

• Heavy fermion superconductivity and magnetic order in non-centrosymmetric $CeP{t}_{3}Si$
• Time-Reversal Symmetry Breaking Superconductivity in Sr2RuO4
• Superconducting 2D system with lifted spin degeneracy: Mixed singlet-triplet state
• musrfit: A free platform-independent framework for muSR data analysis
• Superconductivity and spin-orbit coupling in non-centrosymmetric materials: a review
• S-wave/spin-triplet order in superconductors without inversion symmetry: Li${}_2$Pd${}_3$B and Li${}_2$Pt${}_3$B
• Properties of the Ideal Ginzburg-Landau Vortex Lattice
• Evidence for time-reversal symmetry breaking in the non-centrosymmetric superconductor LaNiC${}_2$
• Time-Reversal Symmetry-Breaking Superconductivity in Heavy Fermion PrOs4Sb12 detected by Muon Spin Relaxation
• Spin Triplet Superconducting State due to Broken Inversion Symmetry in Li_2Pt_3B
• Observation of Time-Reversal Symmetry Breaking in the Non-Centrosymmetric Superconductor Re6Zr
• Unconventional superconductivity in weakly correlated, non-centrosymmetric $\mathrm{M}{\mathrm{o}}_3\mathrm{A}{\mathrm{l}}_2\mathrm{C}$
• Structure and physical properties of the noncentrosymmetric superconductor Mo3Al2C
• Searching for triplet superconductivity in the Quasi-One-Dimensional K2Cr3As3
• Enhancement of Superconducting Transition Temperature due to the strong Antiferromagnetic Spin Fluctuations in Non-centrosymmetric Heavy-fermion Superconductor CeIrSi3 :A 29Si-NMR Study under Pressure
• Evidence for two-gap superconductivity in the non-centrosymmetric compound LaNiC${}_2$
• Multigap superconductivity in sesquicarbides La${}_2$C${}_3$ and Y${}_2$C${}_3$
• Time-reversal symmetry breaking in noncentrosymmetric superconductor Re6Hf:further evidence for unconventional behaviour in the alpha-Mn family of materials
• Nodeless superconductivity and time-reversal symmetry breaking in the noncentrosymmetric superconductor Re24Ti5

Cited by in corpus (4)

• Time-reversal symmetry breaking in the noncentrosymmetric Zr${}_3$Ir superconductor
• Enhanced $T_c$ and multiband superconductivity in the fully-gapped ReBe${}_{22}$ superconductor
• Time-reversal symmetry breaking and multigap superconductivity in the noncentrosymmetric superconductor La${}_7$Ni${}_3$
• Mo${}_3$ReRuC: A noncentrosymmetric superconductor formed in the MoReRu-Mo${}_2$C system