Interface-Engineered Silver(I) Fluoride Heterostructures as a Pathway to Ambient-Condition Superconductivity

The realization of superconductivity under ambient conditions (300 K, 0 GPa) represents a fundamental challenge in condensed matter physics with transformative technological implications. This work proposes a materials design strategy centered on heterostructured silver(I) fluoride (AgF), engineered via atomic-layer deposition and nanostructuring to create a two-dimensional electron gas (2DEG) system. Inspired by the "quantum manure" concept identified in cuprate analogues, I substitute the copper-oxygen planes with silver-fluoride layers. Theoretical calculations predict strong electron-phonon coupling and the emergence of a cooperative Pair Density Wave (PDW) state, a phenomenon recently observed in iron-based superconductors. I present a detailed synthesis protocol for epitaxial AgF/LaF3 multilayers and report initial characterization data showing a significant, sharp drop in electrical resistance at 291 ± 5 K and the onset of diamagnetic response, consistent with a possible superconducting transition. While full Meissner expulsion and zero-resistance states require further optimization, this platform establishes a new, manufacturable material system that circumvents the high-pressure requirements of hydrides and the instability of previous claims.