Probing the superconducting gap structure in the noncentrosymmetric topological superconductor ZrRuAs

Abstract

The superconducting gap structure of a topological crystalline insulator (TCI) candidate ZrRuAs ($T_{\mathrm{c}}^{\mathrm{on}}$ = 7.9(1) K) with a noncentrosymmetric crystal structure has been investigated using muon spin rotation/relaxation ($\mu$SR) measurements in transverse-field (TF) and zero-field (ZF) geometries. We also present the results of magnetization, electrical resistivity and heat capacity measurements on ZrRuAs, which reveal bulk superconductivity below 7.9~K. The temperature dependence of the effective penetration depth obtained from the analysis of the TF-$\mu$SR spectra below $T_{\mathrm{c}}$ is well described by an isotropic $s$-wave gap model as also inferred from an analysis of the heat capacity in the superconducting state. ZF $\mu$SR data do not show any significant change in the muon spin relaxation rate above and below the superconducting transition temperature indicating that time-reversal symmetry is preserved in the superconducting state of this material.

arXiv comment10 pages, 6 figures

References in corpus (28)

• Topological Insulators
• Topological insulators and superconductors
• Unpaired Majorana fermions in quantum wires
• Search for Majorana fermions in superconductors
• Topological superconductors: a review
• Heavy fermion superconductivity and magnetic order in non-centrosymmetric $CeP{t}_{3}Si$
• Time-Reversal Symmetry Breaking Superconductivity in Sr2RuO4
• Superconductivity in CuxBi2Se3 and its implications for pairing in the undoped topological insulator
• Topological Crystalline Insulators and Topological Superconductors: From Concepts to Materials
• Symmetry and Topology in Superconductors - Odd-frequency pairing and edge states -
• musrfit: A free platform-independent framework for muSR data analysis
• Magnetic Penetration Depth in Unconventional Superconductors
• Properties of the Ideal Ginzburg-Landau Vortex Lattice
• Bulk superconducting phase with a full energy gap in the doped topological insulator Cu_xBi_2Se_3
• Experimental Realization of Type-II Dirac Fermions in PdTe${}_2$ Superconductor
• Line-Node Dirac Semimetal and Topological Insulating Phase in Noncentrosymmetric Pnictides CaAgX (X = P, As)
• Theoretical aspects of Andreev spectroscopy and tunneling spectroscopy in non-centrosymmetric superconductors: a topical review
• Anomalous Andreev bound state in non-centrosymmetric superconductors
• Possible topologically non-trivial superconducting order parameter in type-II Weyl semimetal T_d-MoTe_2
• Evidence of nodes in the order parameter of the superconducting doped topological insulator Nb${}_x$Bi${}_2$Se${}_3$ via penetration depth measurements
• Properties of Binary Transition-Metal Arsenides (TAs)
• Proximity-Induced Odd-Frequency Superconductivity in a Topological Insulator
• Muon-Spin-Rotation Measurements of the Penetration Depth in the Infinite-Layer Electron-Doped Cuprate Superconductor Sr0.9La0.1CuO2
• Topological Electronic States in HfRuP Family Superconductors
• Time-reversal invariant and fully gapped unconventional superconducting state in the bulk of the topological Nb0.25Bi2Se3
• Probing the superconducting ground state of ZrIrSi: A $\mu$SR study
• A Monopole Mining Method for High Throughput Screening Weyl Semimetals
• Investigation of Superconducting Gap Structure in HfIrSi using muon spin relaxation/rotation

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