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LK-99: Team of Southeast University observed zero resistance below 110 K

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Re: LK-99: Team of Southeast University observed zero resistance below 110 K

#51

Post by jacquesm »

BasedAnon wrote: post #43
jacquesm wrote: post #31

Earlier quoted context omitted.

It is and it isn't. It's at ambient pressure (which is something useful), and there is something very odd happening much higher up that needs to be explained. They say their sample purity is higher than the one the Korean team had, so that would normally lead to better yield and easier confirmation of the superconductivity. But since it does show the Meissner effect in other samples as well at room temperature there…

perhaps an impurity caused the effect they're looking for

Yes, that's possible and something that has already happened once before: this is exactly how x-rays and eventually radioactivity were discovered, a chance contamination.

Re: LK-99: Team of Southeast University observed zero resistance below 110 K

#52

Post by BasedAnon »

monkeynotes wrote: post #46
distortionfield wrote: post #28

Earlier quoted context omitted.

It seems more and more like it's credible, but that synthesis is going to prove to be the issue. All these repro attempts are having too much success for there to be nothing behind the team's claims.

Can you explain why -160c is a measure of success when the claim was room temperature? A super conductor functioning at -160c would make MRIs simpler, but it's not world changing.

because it's a very unexpected result, it shouldn't be levitating at room temperature and the random drop in resistance at certain temperatures doesn't make sense

Re: LK-99: Team of Southeast University observed zero resistance below 110 K

#53

Post by bilsbie »

Ok not sure how to phrase this:

Could there be small pieces of RTSC inside the sample (causing the floating)

But then enough impurities to not be able to complete a circuit through the sample?

And cooling makes other parts of the sample super conducting?

Re: LK-99: Team of Southeast University observed zero resistance below 110 K

#54

Post by jacquesm »

BasedAnon wrote: post #49
chaimanmeow wrote: post #7

credibility of LK99 claims is very very high. What are the medium term practical implications for all these potential applications?

increased geopolitical tension

That is an interesting observation and puts words to some thoughts that I've had: if it turns out that this is 'the real thing' and the patent holds up South Korea is suddenly a superpower.

Re: LK-99: Team of Southeast University observed zero resistance below 110 K

#55

Post by jacquesm »

valine wrote: post #40
jacquesm wrote: post #27

Earlier quoted context omitted.

Yes, very odd. This may be why the original team believes they have a superconductor on their hands, but it doesn't quite get there and yet it does show the Meissner effect so something doesn't quite add up yet.

Original team had 20 years to play the synthesis lottery. Maybe you tweak the setting just enough and that low resistance drops to zero. Who knows, I’m still feeling optimistic. He said in the video that their sample was more pure than the original paper. Would be wild if some impurity is what pushes it over the edge to a full blown super conductor.

They weren't quite playing the lottery as much as they were taking stacks of tickets and scratching them all off one by one to find something that looks like it might be a winner. This was very hard work. 100's or even thousands of samples.

> Would be wild if some impurity is what pushes it over the edge to a full blown super conductor.

I already mentioned this in another comment, but x-rays and radioactivity were discovered in that precise way.

Re: LK-99: Team of Southeast University observed zero resistance below 110 K

#57

Post by azernik »

creatorpiece123 wrote: post #21

Read the graph, there is a sharp drop in resistance from 220K-250K. Its still not superconducting but it could be hinting something?

Could indicate some superconducting regions in the whole sample, or some weird anisotropic superconduction at higher temps...

That sharp drop, if not equipment error, could be a lot of things.

Re: LK-99: Team of Southeast University observed zero resistance below 110 K

#58

Post by rfoo »

jacquesm wrote: post #27
valine wrote: post #16

Earlier quoted context omitted.

What’s the explanation for the sudden drop between 230K and 250K? It’s not dropping to zero but something is happening there.

Yes, very odd. This may be why the original team believes they have a superconductor on their hands, but it doesn't quite get there and yet it does show the Meissner effect so something doesn't quite add up yet.

Note that the team claiming a zero resistance replicate at 110K is the same team who said failed to replicate Meissner a few days ago. In the latest video they still don't think they have observed Meissner.

Re: LK-99: Team of Southeast University observed zero resistance below 110 K

#60

Post by jacquesm »

rfoo wrote: post #58
jacquesm wrote: post #27

Earlier quoted context omitted.

Yes, very odd. This may be why the original team believes they have a superconductor on their hands, but it doesn't quite get there and yet it does show the Meissner effect so something doesn't quite add up yet.

Note that the team claiming a zero resistance replicate at 110K is the same team who said failed to replicate Meissner a few days ago. In the latest video they still don't think they have observed Meissner.

Yes, true, but other teams say they have so it's a bit of a mixed result.

But given some time all of that will resolve. Fascinating to see science at work at this level out in the open.

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