Thin layered Sr3Cr2O7−δ crystalline film created using pulsed laser deposition, then oxidized, has 5 orders of magnitude less electrical resistivity

https://www.eurekalert.org/news-releases/1103741

"oxidized by treating with heat in air... fills oxygen vacancies/ changes chromium atoms' oxidation state, collectively allowing conduction electrons to pass through more easily... also applicable to other materials with drastically tunable physical properties... for use in memristors, electronic elements encoding memory of previous states, critical for developing more power-efficient, next-generation AI computing chips that can meet the growing demand for greater computing power"