We show that interlayer current induces topological superconductivity in twisted bilayers of nodal superconductors. A bulk gap opens and achieves its maximum near a “magic” twist angle ${\theta }_{\mathrm{MA}}$. Chiral edge modes lead to a quantized thermal Hall effect at low temperatures. Furthermore, we show that an in-plane magnetic field creates a periodic lattice of topological domains with edge modes forming low-energy bands. We predict their signatures in scanning tunneling microscopy. Estimates for candidate materials indicate that twist angles $\theta \sim {\theta }_{\mathrm{MA}}$ are optimal for observing the predicted effects.

• Received 5 April 2021
• Revised 6 December 2022
• Accepted 13 March 2023

DOI:https://doi.org/10.1103/PhysRevLett.130.186001