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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

#141

Post by faraggi »

jacquesm wrote: post #122
uyhgr wrote: post #108

Earlier quoted context omitted.

The term is “flux pinning”, and it only applies to the “quantum lock” effect. That is the specifically static hovering effect. The diamagnetism, importantly this means repulsion of both poles simultaneously and equally (this is how you can have these magnets spin, a regular magnet repels same poles and attracts opposites, diamagnets repel both poles), is simply a characteristic of the superconductor, but it alone wou…

NileRed is youtube gold. It's one of very few channels that I follow and learn from.

I agree, great channel, but the cadence in his narration is atrocious.

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

#142

Post by jacquesm »

faraggi wrote: post #141
jacquesm wrote: post #122

Earlier quoted context omitted.

NileRed is youtube gold. It's one of very few channels that I follow and learn from.

I agree, great channel, but the cadence in his narration is atrocious.

It's fantastic compared to a lot of the people that I interact with on a daily basis so it doesn't bother me.

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

#143

Post by ochn »

hatsunearu wrote: post #103

The Fig 3a)b) graphs are not showing superconductivity. That just looks like the resistance dips below the ~1e-5 mark and goes goes deep into the noise. That just looks like a normal conductor that has a positive temperature coefficient. edit: to add speculation, I think they made something that's not quite LK-99, and it's behaving like a normal conductor with no superconductance.

I also agree, looks like they just reached the instrument noise floor. This result should be taken with a grain of salt.

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

#144

Post by floxy »

BasedAnon wrote: post #52
monkeynotes wrote: post #46

Earlier quoted context omitted.

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

Does anyone know what S.R. Hadden has been up to lately? A new high-temperature superconductor seems like the perfect cover story for a fraud scheme around room temperature superconductors.

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

#146

Post by depereo »

gchadwick wrote: post #14

Certainly no expert here but if you take the original video and replications at face value it does exhibit strong diamagnetism at room temperature. Superconductors are diamagnetic due to the Meissner effect at their superconducting temperature. This would mean LK99 is a superconductor at low temperature and separately be strongly diamagnetic at room temperature (no Meissner effect if it's not super conducting). Would…

I would say any results that are already out are from people speedrunning production; give it another six or so days and there will be a ton of labs that have managed to produce various, better samples and will have performed decent experimentation on these.

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

#148

Post by saberdancer »

modeless wrote: post #121

To me this is encouraging. 110K is really high! It's higher than YBCO which is what they make commercial "high temperature" superconducting tape out of. IMO if this is legit (I have no way of judging the source) then this is the first good third party evidence that the original researchers are not just doing some kind of fraud. A total fraud wouldn't have actually discovered a novel high-temperature, but not room tem…

I think most people are just seeing the headline 110K instead of realizing the implications (not a scam, not a mistake, hard to replicate).

I was quite sceptical earlier today due to unconvincing videos but this finding pushes it heavily into "This might be it" territory.

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

#149

Post by coolspot »

ugh123 wrote: post #124

The linked video mentions something about "outer space islands" in the subtitles. Is that just bad auto-translation or did they seriously discover something amazing?

They found “islands” of superconductivity on the resistivity graph.

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

#150

Post by threatripper »

scarmig wrote: post #13

Interesting. Some people are getting strong diamagnetism at RTP, and now someone is actually seeing zero resistance at a low temperature. I'd take this as mildly positive news. It would be a surprising material if it were a high Tc (only in the LN2 sense) superconductor that is also strongly diamagnetic at room temperature (though I'm not sure if that's more surprising than a RTP superconductor).

If only part of the sample is superconducting and the other parts are ordinary conductors or isolators, the superconducting islands could show diamagnetism while being isolated from each other which means that eletrical current needs to pass resistive areas and therefore experiences resistance.
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