Weebit - 2022 and beyond, page-1201

and today I hit this - I'm eating my own words Fatman and happy you corrected me - you're all over it
surprised I hadn't known of this earlier - thanks for the heads up ......could indeed be a 'secret sauce' from the Professor to Weebit



https://www.eetimes.com/rram-breaks-records-with-graphene/

The material stack starts with a metallic contact at the bottom (platinum in the proof of concept prototype, but nearly any metal will do, according to Tour) on top of silicon-dioxide insulating layer atop a standard silicon wafer. On top of the metallic contact is a pure tantalum with a nano-porous layer of tantalum-oxide atop the pure tantalum. Ten atomic layers of graphene (multi-layer graphene, or MLG, in the diagram) cap the tantalum-oxide, followed by a top metallic electrode (platinum in the diagram, but again any metal will do, according to Tour).

The memory cell switches on and off by starting out with all zeros–no direct connections between the crossbar electrodes. However, when a programming voltage is applied across two perpendicular crossbars, it causes the oxygen to migrate upward, allowing an all-tantalum filament to form across the porous-tantalum oxide toward the upper electrode. When it hits the graphene barrier layer current flows 10-times better than originally thus creating a “1” in the bit cell.
which followed this earlier work in 2009

https://www.eetimes.com/graphene-memories-denser-than-flash/