Introduction . 1T-TaS 2 is a layered, two-dimensional (2D) quantum material which undergoes an insulator-to-metal transition induced by voltage pulses (Fig.? 1a, b )1 , 2 , 3 , 4. The switching is fast, energy efficient, and reversible, making TaS 2 attractive for device applications5 , 6. Moreover, the layered structure of TaS 2 may enable atomically-thin memristive or neuromorphic devices, providing ultimate scalability inaccessible to 3D crystals7. Ne...