Spontaneous superconducting diode effect in non-magnetic Nb/Ru/SrRuO topological junctions
arXiv:2211.14626 · doi:10.1038/s42005-023-01409-4
Abstract
Non-reciprocal electronic transport in a material occurs if both time reversal and inversion symmetries are broken. The superconducting diode effect (SDE) is an exotic manifestation of this type of behavior where the critical current for positive and negative currents are mismatched, as recently observed in some non-centrosymmetric superconductors with a magnetic field. Here, we demonstrate a SDE in non-magnetic Nb/Ru/SrRuO Josephson junctions without applying an external magnetic field. The cooling history dependence of the SDE suggests that time-reversal symmetry is intrinsically broken by the superconducting phase of SrRuO. Applied magnetic fields modify the SDE dynamically by randomly changing the sign of the non-reciprocity. We propose a model for such a topological junction with a conventional superconductor surrounded by a chiral superconductor with broken time reversal symmetry.
References in corpus (17)
- High Resolution Polar Kerr Effect Measurements of Sr2RuO4: Evidence for Broken Time Reversal Symmetry in the Superconducting State
- Zero-field superconducting diode effect in small-twist-angle trilayer graphene
- Ubiquitous Superconducting Diode Effect in Superconductor Thin Films
- Field-free superconducting diode effect in noncentrosymmetric superconductor/ferromagnet multilayers
- Theory of zero-field superconducting diode effect in twisted trilayer graphene
- Direct Observation of a Superconducting Vortex Diode
- High sensitivity heat capacity measurements on Sr2RuO4 under uniaxial pressure
- Symmetry conditions for the superconducting diode effect in chiral superconductors
- Determining the Surface-To-Bulk Progression in the Normal-State Electronic Structure of Sr2RuO4 by Angle-Resolved Photoemission and Density Functional Theory
- Unveiling unconventional magnetism at the surface of SrRuO
- Higher-Tc Superconducting Phase in Sr2RuO4 Induced by In-Plane Uniaxial Pressure
- High-frequency diode effect in superconducting NbSn micro-bridges
- Nonreciprocal transport in a bilayer of MnBi2Te4 and Pt
- Large Enhancement of 3-K Phase Superconductivity in the Sr2RuO4-Ru Eutectic System by Uniaxial Pressure
- Ferromagnetic SrRuO3 thin-film deposition on a spin-triplet superconductor Sr2RuO4 with highly conducting interface
- Limiting mechanism for critical current in topologically frustrated Josephson junctions
- A Review of Electronic Transport in Superconducting SrRuO Junctions
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- Field-Effect Josephson Diode via Asymmetric Spin-Momentum-Locking States
- Nonreciprocal charge transport and subharmonic structure in voltage-biased Josephson diodes
- Time reversal symmetry breaking and zero magnetic field Josephson diode effect in Dirac semimetal Cd3As2-mediated asymmetric SQUIDs
- Quasiparticles-mediated thermal diode effect in Weyl Josephson junctions
- Superconductivity in amorphous and crystalline Re-Lu films
- Universal route towards field-free electrically polarity-reversible Josephson diode
- Thermodynamic Constraints on Perfect Equilibrium Superconducting Diodes