We show that a planar Josephson junction having d-wave superconducting regions, with a skyrmion crystal placed underneath, produces a robust gate-tunable superconducting diode effect. The spatially-varying exchange field of the skyrmion crystal breaks both inversion and time-reversal symmetries, leading to an asymmetric current-phase relation with an anomalous phase shift. Our theoretical calculations, obtained using resistively and capacitively shunted junction model combined with Bogoliubov-de Gennes method, reveal that the diode efficiency is largely tunable by controlling external gate voltage and skyrmion radius. Incorporation of a d-wave superconductor such as high-Tc Cuprate enables the diode to function at higher operating temperatures. Our results establish a unique and practically-realizable mechanism for devising tunable field-free superconducting diodes based on magnetic texture-superconductor hybrid platforms.
@article{arxiv.2511.00656,
title = {Diode effect in a skyrmion-coupled high-temperature Josephson junction},
author = {Digvijay Singh and Pankaj Sharma and Narayan Mohanta},
journal= {arXiv preprint arXiv:2511.00656},
year = {2025}
}