High-temperature field-free superconducting diode effect in high-Tc cuprates

Abstract

The superconducting diode effect (SDE) is defined by the difference in the magnitude of critical currents applied in opposite directions. It has been observed in various superconducting systems and attracted high research interests. However, the operating temperature of the SDE is typically low and/or the sample structure is rather complex. For the potential applications in non-dissipative electronics, efficient superconducting diodes working in zero magnetic field with high operating temperatures and a simple configuration are highly desired. Here, we report the observation of a SDE under zero magnetic field with operating temperatures up to 72 K and efficiency as high as 22% at 53 K in high-transition-temperature (high-Tc) cuprate superconductor Bi2Sr2CaCu2O8+δ (BSCCO) flake devices. The rectification effect persists beyond two hundred sweeping cycles, confirming the stability of the superconducting diode. Our results offer promising developments for potential applications in non-dissipative electronics, and provide insights into the mechanism of field-free SDE and symmetry breakings in high-Tc superconductors.

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• Superconducting phenomena in systems with unconventional magnets
• Superconducting Diode Effects: Mechanisms, Materials and Applications
• Design of a Josephson diode based on double magnetic impurities
• Biharmonic-Drive Tunable Josephson Diode
• Efficiency of the superconducting diode effect of pair-density-wave states in two-dimensional $d$-wave altermagnets
• Twisted Nodal Superconductors
• Supercurrent-induced antiferromagnetic order and spin-triplet pair generation in quantum critical d-wave superconductors
• Enhanced Superconducting Diode Effect in the Asymmetric Hatsugai-Kohmoto Model
• Dynamical signatures and control of time-reversal breaking in twisted nodal superconductors
• Observation of field-odd and field-free superconducting diode effects in ${\mathrm{Mo}}_2\mathrm{C}$ nanoflakes
• Nanoscale electrothermal-switch superconducting diode for electrically programmable superconducting circuits
• Pressure induced magnetic-field-free superconducting diode effect in NbSe2 flake