Ok from what i understand, this paper is proposing that a very specific substitution of the Copper atom in the place of the lead atom in the lead apatite structure is responsible for this
This only happens at a very specific atomic site but it alters the structure of the material in a way that creates a "Flat Electronic Band" that is key to Supercon
But since it has to be at that very specific site at a very specific atomic proportion it could explain why people are having trouble replicating this material exactly
https://arxiv.org/abs/2307.16892
yeah. I don't have anywhere near the expertise to evaluate that though, so I'm going on vibes and what other people are saying, and I've heard a lot of skepticism. Its not that the paper is fake or wrong, just that his interpretation of it may not be a level headed evaluation of the prospects. Honestly it's cool either way. I did get a chuckle out of this video though (which doesn't directly relate to the superconducting abilities of the material, just the silly demo video that was on their website)