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High‐temperature superconductors (HTSs) are important for potential applications and for understanding the origin of strong correlations. Bi 2 Sr 2 CaCu 2 O 8+δ  (BSCCO), a van der Waals material, offers a platform to probe the physics down to a unit‐cell. Guiding the flow of electrons by patterning 2DEGS and oxide heterostructures has brought new functionality and access to new science. Similarly, modifying superconductivity in HTS locally, on a small length scale, is of immense interest for superconducting electronics. A route to modify superconductivity locally by depositing metal on the surface is reported here by transport studies on few unit‐cell thick BSCCO. Deposition of chromium (Cr) on the surface over a selected area of BSCCO results in insulating behavior of the underlying region. Cr locally depletes oxygen in CuO 2  planes and disrupts the superconductivity in the layers below. This technique of modifying superconductivity is suitable for making sub‐micrometer superconducting wires and more complex superconducting devices.

On‐Demand Local Modification of High‐ T c Superconductivity in Few Unit‐Cell Thick Bi 2 Sr 2 CaCu 2 O 8+δ