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Ferromagnetic half levitation of LK-99-like synthetic samples

arxiv.org

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Re: Ferromagnetic half levitation of LK-99-like synthetic samples

#41

Post by javajosh »

ldjkfkdsjnv wrote: post #38

I knew it was fake, there would have been a huge rise in the stock market. Financial markets would have sniffed this out. The market never lies. If anything, this was an obvious opportunity to short it on prediction markets.

If fake those researchers careers are over. Like, they'll have to go into programming or something. And they've also besmirched the good name of Korea, and their moms are going to beat the shit out of them for fucking up that bad. They've got a LOT to lose if this is fake, which is why I think it's most likely true. But hey, sometimes people just do crazy shit.

Re: Ferromagnetic half levitation of LK-99-like synthetic samples

#42

Post by ldjkfkdsjnv »

javajosh wrote: post #41
ldjkfkdsjnv wrote: post #38

I knew it was fake, there would have been a huge rise in the stock market. Financial markets would have sniffed this out. The market never lies. If anything, this was an obvious opportunity to short it on prediction markets.

If fake those researchers careers are over. Like, they'll have to go into programming or something. And they've also besmirched the good name of Korea, and their moms are going to beat the shit out of them for fucking up that bad. They've got a LOT to lose if this is fake, which is why I think it's most likely true. But hey, sometimes people just do crazy shit.

Impossible, wall street has some of the smartest scientists on the planet. They absolutely went through the research and determined it was a fake. Look at the AI boom, nasdaq rallied 40%. Superconductor would have had the same effect

Re: Ferromagnetic half levitation of LK-99-like synthetic samples

#43

Post by scythe »

A ferromagnetic oxide featuring copper as the sole transition metal would be very weird. I'm not aware of any examples of the copper block demonstrating ferromagnetism without a more "conventional" ferromagnetic transition metal (from Cr to Ni and cousins).

But ferromagnetism has been demonstrated in black phosphorus:

https://www.sciencedirect.com/science/article/pii/S003810981...

So the most likely explanation for the observation here is that the sample contains black phosphorus. But do all the samples contain black phosphorus?

Re: Ferromagnetic half levitation of LK-99-like synthetic samples

#44

Post by dylan604 »

NovaDudely wrote: post #37
VHRanger wrote: post #4

After reading the r/physics thread on LK-99 [1] I've cooled significantly on the matter. Basically: people who work in SC think the initial science seems very sloppy and the replication attempts don't come close to what you need to demonstrate a RT SC [1] https://www.reddit.com/r/Physics/comments/15i3h9d/lk99_megat...

I have been very cautious on any analysis on LK99 - especially my own. I have mentioned to many people that any potential application of this stuff comes with an 'if it is real'. That IF is doing a lot of heavy lifting and it has to be emphasized. I want this to be a thing, but it doesn't matter how much you want something to be true, it actually HAS to be true. A beautiful elegant idea can be crushed by a single ugl…

[flagged]

Re: Ferromagnetic half levitation of LK-99-like synthetic samples

#45

Post by phyzome »

VHRanger wrote: post #11
carabiner wrote: post #9

Earlier quoted context omitted.

People were saying the initial papers were trash in the first day of their release over a week ago, so that's ancient history and immaterial now. Same with the "replications," they're obviously insufficient when they're generating pieces the size of a pin head that can't be attached to probes. All of us are in a holding pattern waiting for some big lab like Argonne to confirm or deny its SC status.

How would you *deny* the SC status? Replications keep failing until everyone is pretty sure it's not it. Proving the absence of something is rare to see.

What you'd have to do is 1) create bulk LK-99, 2) prove that that's what you'd created, 3) possibly also show that it's monocrystalline or something, and then 4) show that there's electrical resistance.

The problem is that the stuff is really quite difficult to synthesize reliably. Until that can happen, good luck finding out in either direction!

Re: Ferromagnetic half levitation of LK-99-like synthetic samples

#46

Post by Jweb_Guru »

jefftk wrote: post #22
VHRanger wrote: post #11

Earlier quoted context omitted.

How would you *deny* the SC status? Replications keep failing until everyone is pretty sure it's not it. Proving the absence of something is rare to see.

Couldn't there be solid evidence that the observed behavior was due to a different effect?

There is, a combination of strong (but not amazingly strong) diamagnetism at low field strengths and soft ferromagnetism (in floating samples) at high field strengths. Which is exactly what the paper in the link observed while getting the same results everyone else has. The only unambiguous sign of superconductivity was the original resistance graph which can apparently be explained by contact issues with four point probes (you can argue that they must have done many experiments and surely didn't cherrypick just the one where they found "superconductivity", but consider the quality of the rest of the paper...)

Re: Ferromagnetic half levitation of LK-99-like synthetic samples

#47

Post by readyplayernull »

jefftk wrote: post #22
VHRanger wrote: post #11

Earlier quoted context omitted.

How would you *deny* the SC status? Replications keep failing until everyone is pretty sure it's not it. Proving the absence of something is rare to see.

Couldn't there be solid evidence that the observed behavior was due to a different effect?

Maybe the original LK-99 sample was contaminated with actual high temperature superconducting impurities.

Re: Ferromagnetic half levitation of LK-99-like synthetic samples

#48

Post by dylan604 »

jefftk wrote: post #22
VHRanger wrote: post #11

Earlier quoted context omitted.

How would you *deny* the SC status? Replications keep failing until everyone is pretty sure it's not it. Proving the absence of something is rare to see.

Couldn't there be solid evidence that the observed behavior was due to a different effect?

[flagged]

Re: Ferromagnetic half levitation of LK-99-like synthetic samples

#49

Post by delabay »

ldjkfkdsjnv wrote: post #42
javajosh wrote: post #41

Earlier quoted context omitted.

If fake those researchers careers are over. Like, they'll have to go into programming or something. And they've also besmirched the good name of Korea, and their moms are going to beat the shit out of them for fucking up that bad. They've got a LOT to lose if this is fake, which is why I think it's most likely true. But hey, sometimes people just do crazy shit.

Impossible, wall street has some of the smartest scientists on the planet. They absolutely went through the research and determined it was a fake. Look at the AI boom, nasdaq rallied 40%. Superconductor would have had the same effect

Like how the markets caught on to Covid in early February 2020?

China shutting down, drowning in body bags, yet US markets don't flinch.

Re: Ferromagnetic half levitation of LK-99-like synthetic samples

#50

Post by ssa_form »

ldjkfkdsjnv wrote: post #42
javajosh wrote: post #41

Earlier quoted context omitted.

If fake those researchers careers are over. Like, they'll have to go into programming or something. And they've also besmirched the good name of Korea, and their moms are going to beat the shit out of them for fucking up that bad. They've got a LOT to lose if this is fake, which is why I think it's most likely true. But hey, sometimes people just do crazy shit.

Impossible, wall street has some of the smartest scientists on the planet. They absolutely went through the research and determined it was a fake. Look at the AI boom, nasdaq rallied 40%. Superconductor would have had the same effect

Yes but LK-99 is practically unusable in current form if it's a superconductor. There needs to be a lot more material science research before it can be put into utopian use cases that everyone is dreaming about. Recent AI boom brought a lot more finished products which can be immediately put to use.
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