In-plane magnetic penetration depth in Sr${}_2$RuO${}_4$: muon-spin rotation/relaxation study

Abstract

We report on measurements of the in-plane magnetic penetration depth (${\lambda }_{\mathrm{ab}}$) in single crystals of Sr${}_2$RuO${}_4$ down to $\simeq 0.015$ K by means of muon-spin rotation/relaxation. The linear temperature dependence of ${\lambda }_{\mathrm{ab}}^{-2}$ for $T\lesssim 0.7$ K suggests the presence of nodes in the superconducting gap. This statement is further substantiated by observation of the Volovik effect, $i.e.$ the reduction of ${\lambda }_{ab}^{-2}$ as a function of the applied magnetic field. The experimental zero-field and zero-temperature value of ${\lambda }_{\mathrm{ab}}=124(3)$ nm agrees with ${\lambda }_{\mathrm{ab}}\simeq 130$ nm, calculated based on results of electronic structure measurements reported in [Phys. Rev X 9, 021048 (2019)]. Our analysis reveals that a simple nodal superconducting energy gap, described by the lowest possible harmonic of a gap function, does not capture the dependence of ${\lambda }_{\mathrm{ab}}^{-2}$ on $T$, so the higher angular harmonics of the energy gap function need to be introduced.

arXiv comment7 pages, 3 figures

References in corpus (43)

• Time-Reversal Symmetry Breaking Superconductivity in Sr2RuO4
• musrfit: A free platform-independent framework for muSR data analysis
• Pronounced drop of ${}^{17}$O NMR Knight shift in superconducting state of Sr${}_2$RuO${}_4$
• Properties of the Ideal Ginzburg-Landau Vortex Lattice
• Fermi Surface, Surface States, and Surface Reconstruction in Sr2RuO4
• Superconducting Gap Anisotropy and Quasiparticle Interactions: a Doping Dependent ARPES Study
• Detailed Topography of the Fermi Surface of Sr2RuO4
• Gap Structure of the Spin-Triplet Superconductor Sr2RuO4 Determined from the Field-Orientation Dependence of Specific Heat
• High-resolution photoemission on Sr2RuO4 reveals correlation-enhanced effective spin-orbit coupling and dominantly local self-energies
• Split superconducting and time-reversal symmetry-breaking transitions, and magnetic order in Sr${}_2$RuO${}_4$ under uniaxial stress
• Evidence for complex order parameter in La_{1.83}Sr_{0.17}CuO_4
• Ultrasound Attenuation in Sr${}_2$RuO${}_4$: an Angle-Resolved Study of the Superconducting Gap Function
• Momentum-resolved superconducting gap in the bulk of Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ from combined ARPES and $\mu$SR measurements
• Pairing symmetry and dominant band in Sr2RuO4
• A proposal for reconciling diverse experiments on the superconducting state in Sr2RuO4
• Stabilizing Even-Parity Chiral Superconductivity in Sr${}_2$RuO${}_4$
• Strain Control of Fermiology and Many-Body Interactions in Two-Dimensional Ruthenates
• Knight Shift and Leading Superconducting Instability From Spin Fluctuations in Sr2RuO4
• Singularity of the Vortex Density of States in d-wave Superconductors
• Momentum Resolved Superconducting Energy Gaps of Sr${}_2$RuO${}_4$ from Quasiparticle Interference Imaging
• Universal Heat Transport in Sr2RuO4
• Vertical line nodes in the superconducting gap structure of Sr2RuO4
• Evidence for even parity unconventional superconductivity in Sr${}_2$RuO${}_4$
• Comparison of different methods for analyzing $\mu$SR line shapes in the vortex state of type-II superconductors
• Unsplit superconducting and time reversal symmetry breaking transitions in Sr${}_2$RuO${}_4$ under hydrostatic pressure and disorder
• Volovik effect in the $\pm$s-wave state for the iron-based superconductors
• Inhomogeneous time-reversal symmetry breaking in ${\mathrm{Sr}}_2\mathrm{Ru}{\mathrm{O}}_4$
• Angular dependence of the upper critical field of Sr2RuO4
• Nodeless spin triplet superconducting gap in Sr2RuO4
• Study of the magnetic penetration depth in RbOs_2O_6
• Improved Single-Crystal Growth of Sr${}_2$RuO${}_4$
• Muon-spin rotation measurements of the vortex state in Sr${}_2$RuO${}_4$: type-1.5 superconductivity, vortex clustering and a crossover from a triangular to a square vortex lattice
• Muon-spin rotation measurements of the penetration depth of the Mo_3Sb_7 superconductor
• Field-induced quasiparticle excitations in novel type II superconductors
• Proximity induced superconductivity within the insulating (Li${}_{0.84}$Fe${}_{0.16}$)OH layers in (Li${}_{0.84}$Fe${}_{0.16}$)OHFe${}_{0.98}$Se
• Volovik effect in a highly anisotropic multiband superconductor: experiment and theory
• Higher angular momentum pairings in interorbital shadowed-triplet superconductors: Application to Sr${}_2$RuO${}_4$
• Intrinsic nature of spontaneous magnetic fields in superconductors with time-reversal symmetry breaking
• Hierarchy of Lifshitz transitions in the surface electronic structure of Sr${}_2$RuO${}_4$ under uniaxial compression
• The penetration depth in Sr2RuO4: Evidence for orbital dependent superconductivity
• Zero-field superfluid density in d-wave superconductor evaluated from the results of muon-spin-rotation experiments in the mixed state
• Higher angular momentum pairing states in Sr${}_2$RuO${}_4$ in the presence of longer-range interactions
• Nodal gaps from local interactions in Sr${}_2$RuO${}_4$

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• Orientation-dependent Josephson effect in spin-singlet superconductor/altermagnet/spin-triplet superconductor junctions
• Muon Knight shift as a precise probe of the superconducting symmetry of Sr${}_2$RuO${}_4$
• Josephson effects in the spin-triplet superconductor/altermagnet/spin-triplet superconductor junctions: the detection of the intrinsic $\mathbf{d}$-vector
• Beyond Homes scaling: disorder, the Planckian bound and a new universality