Nanosculpting using focused ion beams carves complex 3D nanodevices directly from topological magnetic single-crystal Co3Sn2S2

https://www.sciencedaily.com/releases/2026/01/260125081138.htm

"overcomes 2D fabrication limitations which degrade material choices/ quality... fabricates helical switchable diodes... chiral (twisted) helix: electric current flows more easily in 1 direction then the other (non-reciprocal)... diode effect reversed by either changing crystal magnetization/ altering the helix's handedness... low-power, shape-engineered components: memory, logic, and sensing technologies that move beyond the constraints of conventional flat electronics"