Anomalous superconducting diode effect in a polar superconductor
arXiv:2303.16238 · doi:10.1103/PhysRevB.107.L100504
Abstract
A superconductor with broken time reversal and inversion symmetry may exhibit nonreciprocal charge transport, including a nonreciprocal critical current, also known as superconducting diode effect. We report an intrinsic superconducting diode effect in a polar strontium titanate film. Differential resistance measurements reveal a superconducting state whose depairing current is polarity dependent. There is, however, no measurable deviation from Ohmic behavior, implying that this state does not arise from a bulk magnetochiral anisotropy. In the entire measurement range, the only deviation from linearity in the differential resistance is on the edge of the superconducting transition at high magnetic fields, likely due to the motion of flux vortices. Furthermore, the magnitude of the effect is preserved even when the in-plane magnetic field is oriented parallel to the current, indicating that this effect truly does not originate from a bulk magnetochiral anisotropy.
References in corpus (11)
- A Josephson junction supercurrent diode
- Supercurrent diode effect and finite momentum superconductivity
- A phenomenological theory of superconductor diodes
- Nonreciprocal charge transport in two-dimensional noncentrosymmetric superconductors
- Nonreciprocal current in noncentrosymmetric Rashba superconductors
- Topological superconductivity and unconventional pairing in oxide interfaces
- Ferroelectric enhancement of superconductivity in compressively strained SrTiO films
- Topological metals and finite-momentum superconductors
- Possible signatures of mixed-parity superconductivity in doped polar SrTiO3 films
- Quantum and classical ratchet motions of vortices in a 2D trigonal superconductor
- Nonreciprocal Meissner response in parity-mixed superconductors
Cited by in corpus (14)
- Altermagnetic superconducting diode effect
- Field-free Josephson diode effect in altermagnet/normal metal/altermagnet junctions
- High-temperature field-free superconducting diode effect in high-Tc cuprates
- Enhanced Superconducting Diode Effect due to coexisting Phases
- Supercurrent Diode Effect in Helical Superconductors
- Time reversal symmetry breaking and zero magnetic field Josephson diode effect in Dirac semimetal Cd3As2-mediated asymmetric SQUIDs
- Orbital effect on intrinsic superconducting diode effect
- Superconducting diode efficiency from singlet-triplet mixing in disordered systems
- Design of a Josephson diode based on double magnetic impurities
- Superconducting diode effect in Ising superconductors
- Dissipation-enhanced non-reciprocal superconductivity: application to multi-valley superconductors
- Vortex-driven superconducting diode effect in asymmetric multilayer heterostructures
- Universal route towards field-free electrically polarity-reversible Josephson diode
- Thermodynamic Constraints on Perfect Equilibrium Superconducting Diodes