Crystallographic and superconducting properties of the fully-gapped noncentrosymmetric 5d-electron superconductors CaMSi3 (M=Ir, Pt)

Abstract

We report crystallographic, specific heat, transport, and magnetic properties of the recently discovered noncentrosymmetric 5d-electron superconductors CaIrSi3 (Tc = 3.6 K) and CaPtSi3 (Tc = 2.3 K). The specific heat suggests that these superconductors are fully gapped. The upper critical fields are less than 1 T, consistent with limitation by conventional orbital depairing. High, non-Pauli-limited μ0 Hc2 values, often taken as a key signature of novel noncentrosymmetric physics, are not observed in these materials because the high carrier masses required to suppress orbital depairing and reveal the violated Pauli limit are not present.

8 pages, 8 figures

References in corpus (9)

• Heavy fermion superconductivity and magnetic order in non-centrosymmetric $CeP{t}_{3}Si$
• Superconductivty without inversion symmetry: MnSi versus CePt_3Si
• S-wave/spin-triplet order in superconductors without inversion symmetry: Li${}_2$Pd${}_3$B and Li${}_2$Pt${}_3$B
• Evidence for time-reversal symmetry breaking in the non-centrosymmetric superconductor LaNiC${}_2$
• Spin Triplet Superconducting State due to Broken Inversion Symmetry in Li_2Pt_3B
• Electron Correlation and Pairing States in Superconductors without Inversion Symmetry
• MgB2 single crystals: high pressure growth and anisotropic properties
• Superconductivity in Rh${}_2$Ga${}_9$ and Ir${}_2$Ga${}_9$ without Inversion Symmetry
• Magnetic Properties in Non-centrosymmetric Superconductors with and without Antiferromagnetic Order

Cited by in corpus (22)

• Superconductivity and spin-orbit coupling in non-centrosymmetric materials: a review
• Observation of Time-Reversal Symmetry Breaking in the Non-Centrosymmetric Superconductor Re6Zr
• `Ferroelectric' Metals Reexamined: Fundamental Mechanisms and Design Considerations for New Materials
• Time Reversal Symmetry Breaking in noncentrosymmetric superconductor Re6Ti
• Investigations of the superconducting states of noncentrosymmetric LaPdSi3 and LaPtSi3
• Physical properties of noncentrosymmetric superconductor LaIrSi3: A μSR study
• Superconducting and normal-state properties of the noncentrosymmetric superconductor Re6Zr
• Abrupt enhancement of non-centrosymmetry and appearance of the spin-triplet superconducting state in Li_2(Pd_{1-x}Pt_{x})_3B beyond x=0.8
• Superconductivity in Noncentrosymmetric Iridium Silicide Li2IrSi3
• Superconductivity in the Hexagonal Ternary Phosphide ScIrP
• Probing the superconducting ground state of the noncentrosymmetric superconductors CaTSi3 (T = Ir, Pt) using muon-spin relaxation and rotation
• Superconductivity in Nb2Pd3Te5 and Chemically-Doped Ta2Pd3Te5
• Superconductivity induced by Mg deficiency in non-centrosymmetric phosphide Mg${}_2$Rh${}_3$P
• Magnetic Phase Diagram of Li_2(Pd_{1-x}Pt_x)_3B by AC Susceptometry
• Signatures of the Helical Phase in the Critical Fields at Twin Boundaries of Non-Centrosymmetric Superconductors
• Large spin-orbit splitting and weakly-anisotropic superconductivity revealed with single-crystalline noncentrosymmetric CaIrSi3
• Electronic structure of non-centrosymmetric superconductor LaPdSi3 and its reference compound LaPdGe3
• High-pressure synthesis and superconductivity of the novel Laves phase BaIr2
• Nodeless superconductivity in noncentrosymmetric LaRhSn
• Pressure study of the noncentrosymmetric 5d-electron superconductors CaMSi3 (M= Ir, Pt)
• Evidence of s-wave superconductivity in the noncentrosymmetric La${}_7$Ir${}_3$
• Superconductivity in Ternary Zirconium Telluride Zr6RuTe2