Monolayer FeSe on SrTiO 3 superconducts with reported T c as high as 100 K, but the dramatic interfacial T c enhancement remains poorly understood. Oxygen vacancies in …
When a single atomic layer (single unit cell, UC) of FeSe is grown on SrTiO 3 (FeSe/STO), its superconducting transition temperature (T c) and superconducting gap show a striking …