Big doubt. People have self-published shit like this a lot over the past decade or two. Usually it turns out to be a measurement error if it goes anywhere at all. Post again when this is peer-reviewed.
Edit: A month on, here's Nature's autopsy. The big question for me is why this one went viral when most USOs just fade into obscurity.
If would be one hell of an error, if so, to get measurements across several different properties and temperature ranges that were all consistent with superconductivity.
But even if true, we can make lots of things in very small quantities in laboratories that are far too expensive for practical manufacture. That's where engineering will come in.
If would be one hell of an error, if so, to get measurements across several different properties and temperature ranges that were all consistent with superconductivity.
You're right, maybe it's fraud, at least partly.
I understand it's very hard to measure the conductivity of a microscopic crystal attached to other different crystals, which is why a lot of less-than-solid claims about high-temperature superconductors get made.
I haven't watched it, but I'm not sure how you'd visually prove it's actually the material in question, so it could still be a hoax like all the others.
Replication is literally the only evidence I haven't hardened to after all the error and fraud that's come through.
It's interesting that so many are in a hurry to doubt. Give it a couple of weeks for tries at replication and you'll know for sure. I suppose the first to call BS wins the "I told you so" award. Whereas, if true, it's a Nobel.