> below 110 K It is not room temperature, is it?
0 C is 273.15K, so room temperature is around 295 K. 300 K is a decent approximation to make back-of-the-envelope calculations easier, but I don't know anybody that actually keeps their room at 80 F.
LK-99: Team of Southeast University observed zero resistance below 110 K
251–260 of 361 posts
Re: LK-99: Team of Southeast University observed zero resistance below 110 K
#252Can someone with field expertise explain the implications if this material were real / replicable / cheaply manufacturable? I see a lot of breathless excitement in these comments, as if free energy and perpetual motion machines are right around the corner, but from the few details I've delved into it's more like the electric grid might get 10% more efficient, MRIs might get a little cheaper, etc. What are the excitin…
Transporting solar energy from deserts.
Re: LK-99: Team of Southeast University observed zero resistance below 110 K
#253Earlier quoted context omitted.
I was worried about that too before making the bet, but I realized I couldn't do it anyway and stopped worrying about it. You can find the whole resolution criteria here if you want: https://manifold.markets/QuantumObserver/will-the-lk99-room-...
Thanks. And wow, that's as fuzzy as I was afraid it would be: > ...Willing to adjust this criterion after receiving more info from relevant theorists/experimentalists... > ...I don't intend to require that replications be published in a peer-reviewed journal... However, I do intend to wait a few weeks/months to resolve so that any pre-print can be adequately investigated... > ...Since high Tc superconductivity is not…
Yeah, I was definitely concerned about losing my money to a technicality.
Re: LK-99: Team of Southeast University observed zero resistance below 110 K
#254To 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…
It seems pretty similar to BSCCO: https://en.wikipedia.org/wiki/Bismuth_strontium_calcium_copp...
Re: LK-99: Team of Southeast University observed zero resistance below 110 K
#255Earlier quoted context omitted.
What about European or Japanese scientists? And about Korean scientists not part of the original team? The last should also be able to get their hands on a sample provided by the original team and won't have to do reproduction attempts, right?
Who told you that they are not attempting the reproduction? Even US labs are attempting it, some of them explicitly in the open like the Argonne National Laboratory. Here you can find a non-comprehensive list of reproduction attempts: https://forums.spacebattles.com/threads/claims-of-room-tempe...
Oh, so there are finally Korean labs in that list! Last time there were 1 American, 1 Indian and 5 Chinese labs which I thought very weird. Hopefully the Korean labs can get an original sample.
Re: LK-99: Team of Southeast University observed zero resistance below 110 K
#256Earlier quoted context omitted.
As a layman, how do you know this is huge?
Assuming they discovered a low cost, room temperature, room pressure, superconductor, there are many HUGE technological advancements that can be made that would impact your daily life. Possibilities include improved battery longevity in all devices(probably in an order of magnitude), low friction transport improvements (ie. cheaper high speed rail), and faster and higher bandwidth wired connections. https://en.wikipe…
> improved battery longevity
No
> probably in an order of magnitude
Absolutely not.
> Low friction transport improvements
This material is superconductive at 110K (-163C). Not exactly usable for transport applications.
> faster and higher bandwidth wired connections.
Absolutely not, resistance has no impact on bandwidth.
I've seen variations of this comment on hacker news. Superconductors are not magic dust to make things better. They are conductors with 0 resistance. There are certainly applications for that (see the wiki you linked) but like all things based in reality those are all a lot more muted and probably not possible with the current materials.
You are getting excited about the possibility of wires. There are certainly cool things you can do with a nice wire, but it's still a wire. You can't store power much with it, It's too big to make logic circuits with, and applications (like levitating a train) require too many amps for our poor wire to remain a special wire. (Most super conductive materials lose conductivity when amps are too high).
Re: LK-99: Team of Southeast University observed zero resistance below 110 K
#257Earlier quoted context omitted.
As a layman, how do you know this is huge?
Assuming they discovered a low cost, room temperature, room pressure, superconductor, there are many HUGE technological advancements that can be made that would impact your daily life. Possibilities include improved battery longevity in all devices(probably in an order of magnitude), low friction transport improvements (ie. cheaper high speed rail), and faster and higher bandwidth wired connections. https://en.wikipe…
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Re: LK-99: Team of Southeast University observed zero resistance below 110 K
#258Earlier quoted context omitted.
“Purity” is a really overloaded term here. There are vast set of material properties that simply don’t map to a definition “purity” as in some homogeneous concentration of a material. This is so early no one likely knows exactly what configuration of material to “purify” for the intended outcome. There will likely be years of not decades of looking at differences in the materials and performance of related materials…
Yes, true, let me unpack that then: - purity as in the sample is uniformly constructed of the right atoms but they are not in the right configuration vs - purity as in the sample contains atoms that shouldn't be there in the first place and finally - purity as in: the sample that purportedly did show room temperature superconductivity turns out to be the impure one and that impurity is so poorly understood that we cu…
> purity as in the sample is uniformly constructed of the right atoms but they are not in the right configuration
The conclusions in the linked pdf suggest this may be the issue with LK99.
Re: LK-99: Team of Southeast University observed zero resistance below 110 K
#259The 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.
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