The superconducting diode effect is a key nonreciprocal phenomenon with broad relevance for superconducting electronics. Using time-dependent Ginzburg-Landau simulations, we predict and quantify a superconducting diode effect arising solely from geometric chirality imposed on a conventional superconductor. The helical geometry and magnetic-field-induced screening currents produce inequivalent critical currents for opposite polarities. The diode efficiency reaches a maximum when one current direction first nucleates vortices, revealing a chirality-controlled crossover between screening- and vortex-dominated nonreciprocity. These results establish mesoscopic geometric chirality as a robust mechanism for supercurrent rectification in an achiral superconductor. They suggest an experimentally accessible route toward 3D superconducting diodes for multilevel integrated quantum circuits.
Deenen et al. (Wed,) studied this question.