Superconducting Double Transition and the Upper Critical Field Limit of Sr2RuO4 in Parallel Magnetic Fields

Abstract

We studied the specific heat and thermal conductivity of the spin-triplet superconductor Sr2RuO4 at low temperatures and under oriented magnetic fields H. We resolved a double peak structure of the superconducting transition under magnetic field for the first time, which provides thermodynamic evidence for the existence of multiple superconducting phases. We also found a clear limiting of the upper critical field Hc2 for the field direction parallel to the RuO2 plane only within 2 degrees. The limiting of Hc2 occurs in the same H-T domain of the second superconducting phase; we suggest that the two phenomena have the same physical origin.

arXiv comment5 pages, 5 figures

References in corpus (8)

• Time-Reversal Symmetry Breaking Superconductivity in Sr2RuO4
• Angular Position of Nodes in the Superconducting Gap of Quasi-2D Heavy-Fermion Superconductor CeCoIn_5
• A polarized neutron-scattering study of the Cooper-pair moment in Sr2RuO4
• Superconducting Gap Structure of Spin-Triplet Superconductor Sr_2RuO_4 Studied by Thermal Conductivity
• Ultrasound Attenuation in Sr${}_2$RuO${}_4$: an Angle-Resolved Study of the Superconducting Gap Function
• Vortex lattice structures of Sr${}_2$RuO${}_4$
• Anisotropy of magnetothermal conductivity in Sr2RuO4
• A reconstruction from small-angle neutron scattering measurements of the real space magnetic field distribution in the mixed state of Sr${}_2$RuO${}_4$

Cited by in corpus (51)

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• Gap Structure of the Spin-Triplet Superconductor Sr2RuO4 Determined from the Field-Orientation Dependence of Specific Heat
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• Reduction of the ${}^{17}$O Knight shift in the Superconducting State and the Heat-up Effect by NMR Pulses on Sr${}_2$RuO${}_4$
• Determination of the Superconducting Gap Structure in All Bands of the Spin-Triplet Superconductor Sr2RuO4
• Ultrasound evidence for a two-component superconducting order parameter in Sr${}_2$RuO${}_4$
• A proposal for reconciling diverse experiments on the superconducting state in Sr2RuO4
• First-Order Superconducting Transition of Sr2RuO4
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• Evidence from Tunneling Spectroscopy for a Quasi-One Dimensional Origin of Superconductivity in Sr2RuO4
• Reduction of the spin susceptibility in the superconducting state of Sr2RuO4 observed by polarized neutron scattering
• Spin-Orbit-Induced Orbital Excitations in Sr2RuO4 and Ca2RuO4: A Resonant Inelastic X-ray Scattering Study
• Angular dependence of the upper critical field of Sr2RuO4
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• Anisotropy of the Superconducting State in Sr2RuO4
• Specific-heat evidence of the first-order superconducting transition in Sr2RuO4
• Spin Polarization Enhanced by Spin-Triplet Pairing in Sr${}_2$RuO${}_4$ Probed by NMR
• Possible three-dimensional nematic odd-parity superconductivity in Sr${}_2$RuO${}_4$
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• Superconducting pairing in Sr${}_2$RuO${}_4$ from weak to intermediate coupling
• Higher-Tc Superconducting Phase in Sr2RuO4 Induced by In-Plane Uniaxial Pressure
• Field-Orientation Dependent Heat Capacity Measurements at Low Temperatures with a Vector Magnet System
• Angular-dependent upper critical field of overdoped Ba(Fe${}_{1-x}$Ni${}_x$)${}_2$As${}_2$
• Leggett modes and multi-band superconductivity in Sr2RuO4
• Random Spin-orbit Coupling in Spin Triplet Superconductors: Stacking Faults in Sr_2RuO_4 and CePt_3Si
• Multiple superconducting transitions in the Sr3Ru2O7 region of Sr3Ru2O7-Sr2RuO4 eutectic crystals
• Constraints on the superconducting state of Sr${}_2$RuO${}_4$ from elastocaloric measurements
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• Spin-orbit Coupling and Multiple Phases in Spin-triplet Superconductor Sr${}_2$RuO${}_4$
• Simultaneous Evidence for Pauli Paramagnetic Effects and Multiband Superconductivity in KFe${}_2$As${}_2$ by Small-Angle Neutron Scattering Studies of the Vortex Lattice
• Spatial development of superconductivity in the Sr2RuO4-Ru eutectic system
• Anisotropy and multiband superconductivity in Sr2RuO4
• Is the anisotropy of the upper critical field of Sr${}_2$RuO${}_4$ consistent with a helical $p$-wave state?
• A note on the upper critical field of Sr${}_2$RuO${}_4$ under strain
• Possibility of mixed helical p-wave pairings in Sr${}_2$RuO${}_4$
• Describing Sr2RuO4 superconductivity in a generalized Ginzburg--Landau theory
• Critical Current of the Spin-Triplet Superconducting Phase in Sr${}_2$RuO${}_4$
• Quenched metastable vortex states in Sr2RuO4
• Magnetic properties of two-phase superconductors
• Second discontinuity in the specific heat of two-phase superconductors
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• Towards a Microscopic Theory of the Knight Shift in an Anisotropic, Multiband Type-II Superconductor
• Systematic evolution of superconducting pairing strength and Seebeck coefficients in correlated infinite-layer La${}_{1-x}$Sr${}_x$NiO${}_2$
• Distinguishing $d_{xz}+i{d}_{yz}$ and $d_{x^2-y^2}$ pairing in $S{r}_{2}Ru{O}_4$ by high magnetic field H-T phase diagrams
• Sub-Phases in the Superconducting State of CeIrIn${}_5$ Revealed by Low Temperature $c$-axis Heat Transport
• High-resolution magnetostriction measurements of the Pauli-limited superconductor Sr2RuO4
• Dependence of the critical temperature on the Higgs field reparametrization