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Andrew Cote (@Andercot)
nitter.netNational Lab (LBNL) results support LK-99 as a room-temperature ambient-pressure superconductor.
Simulations published 1 hour ago on arxiv support LK-99 as the holy grail of modern material science and applied physics.
(https://arxiv.org/abs/2307.16892)
Here's the plain-english explanation:
- The simulations modeled what the original Korean authors proposed was happening to their material - where copper atoms were percolating into a crystal structure and replacing lead atoms, causing the crystal to strain slightly and contract by 0.5%. This unique structure was proposed to allow this amazing property.
- @sineatrix from Lawrence Berkeley National Lab simulated this using heavy-duty compute power from the Department of Energy, and looked to see what would happen to the 'electronic structure' of this material, meaning, what are the available conduction pathways in the material.
- It turns out that there are conduction pathways for electrons that are in just the right conditions and places that would enable them to 'superconduct'. More specifically, they were close to the 'Fermi Surface' which is like the sea-level of electrical energy, as in '0 ft above sea-level.' It's believed currently that the more conduction pathways close to the Fermi surface, the higher the temperature you can superconduct at (An analogy might be how its easier for planes to fly close to the surface of the ocean due to the 'ground effect' that gives them more lift.)
This plot in particular shows the 'bands', or electron pathways, crossing above and below the Fermi surface.
- Lastly, these interesting conduction pathways only form when the copper atom percolates into the less likely location in the crystal lattice, or the 'higher energy' binding site. This means the material would be difficult to synthesize since only a small fraction of crystal gets its copper in just the right location.
This is insanely bullish for humanity.
Key word here is “Simulations”. Of a phenomenon nobody has reproduced yet, and nobody has a complete understanding of how it might work assuming it actually does.
I’m sorry, simulations are actually more impressive to me, it shows there is a potential theoretical mechanism at play here.
Experiments can go wrong, simulations can go wrong, when they both align that’s interesting.
Simulating something you don’t understand is problematic because you don’t know if your models are correct. I can simulate digging a hole to the core of the planet as long as I get the physics wrong.
I agree, but then again experimenting blindly isn’t entirely better, you might not be measuring what you think you’re measuring.
When both align that’s spooky though.
The alternative isn’t blind experimenting, though. The original research publication is full of lots of holes, and even people working to replicate it are noting that it seems more amateurish than it should be.
So, I’m surprised we went from YBCO to strained lattice, even though I actually hoped we would look closer at strained lattice, I just assumed it was far off, you need a much better model, our ReBCO model is fairly weak, trying to jump to strained lattice seems like it would be much harder.
If we found this, we almost certainly found it through pure luck, we’re 30 years from this kindf of material science, we can barely do single-crystal stuff in bulk, this is theoretically more complex if we hadn’t gotten crazy lucky.
But while I’m skeptical, and want to wait, I’m not willing to turn away a possible golden ticket just because I didn’t expect it in my wonkabar.
I’ve seen 40 years of these kinds of claims come and go. If we actually make a massive breakthrough like this, the lab that makes the discovery is going to be incredibly detailed and meticulous, documenting their exact processes, theories, and efforts to reproduce the material(s) from scratch. It’s not going to be someone publishing notes with major variances and holes in the details.
I guess what I’m saying is when you see enough perpetual machines published in the news, you start to realize that if someone actually had one the first thing they’d do is make another one to confirm, and then plan which island they’re going to buy with their new found riches. And that’s to say nothing of whether it’s commercially viable on a cost or production speed basis. LOTS of advancements die on those vines. Just look at the semiconductor research industry.
Still, nice to see a positive counter to some of the early negative-nellies.
I’m really hoping that this stuff proves out in the end, because then I’ll be able to say I Told You So to the doubting Thomases that immediately jumped on the “nothing ever happens” bandwagon when this was first announced.
Oh and I guess the total revolutionary advancement of human civilization will also be a nice secondary benefit.
As someone who works in power electronics… well, not sure how to feel about this lol. But it will certainly be a while before any products are brought to market.
As a programmer, I already went through the “woah, my whole career path is about to fundamentally change” moment when I first got to toy around with ChatGPT earlier this year. Maybe everyone’s going to get a turn at that. :)
Back when the Em drive had its brush with reproducibility a few years ago I thought one of the most fun side effects would be that the crackpot garage tinkerers would have scored a major feather in their caps and everyone would be paying a lot more attention to their crackpottery going forward. These LK-99 developers are quite a few steps above garage-tinkerers, but they’re still far from respected members of some major institution somewhere so perhaps we’ll get a similar flourishing of interest in off-the-beaten-path theories should this turn out to be a real discovery.
So… about that revolutionary advancement. Now that I know where this notion came from, it’s all the more funny to me.
It’s not a positive counter. That’s the thing. Actually read these reports and threads because they aren’t as glowing as headlines make them appear.
If the results were “does not support LK-99 as a room-temperature superconductor”, that would be a negative result. If they hadn’t done the work at all and there were no results, that would be a neutral result. So this is a positive result. It doesn’t have to be a sweeping confirmation to still be positive.
Running the same simulation isn’t a positive result, it’s running the same simulation. Not running tests at all isn’t neutral, it’s nothing. I’m not saying this needs to be some sweeping confirmation, I’m saying that when you read these reports they aren’t the results that headlines would have you believe.
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