There is a Checz lab also documenting the process https://twitter.com/CondMatfyz
Andrew McCalip demonstrates synthesis of LK99
21–30 of 363 posts
Re: Andrew McCalip demonstrates synthesis of LK99
#22I don't see why people go crazy over this, the meissner effect in superconductors look different.
Some speculate its a monocrystsline "1D" superconductor, which could explain its different behavior.
But that is out of my depth. I am still trying to wrap my head around a directional superconductor/resistor...
Re: Andrew McCalip demonstrates synthesis of LK99
#23[flagged]
Clicked through 3 links to be greeted with "Disclaimer: I’m no physicist nor chemist...It turned out that LK folks were not talking about some stupid shit." -- combined with "(Note: was written and published hours before this demonstration.)", and there wasn't an attempt to explain the connection between TFA and this new other article I'm supposed to read. I'm good, thanks.
"I’m no physicist nor chemist" means that I have no qualification to say whether the theory is legitimate or not.
"It turned out that LK folks were not talking about some stupid shit" means that their theory is not out of the thin air, but rather based on some alternative theory that has not been actually disproven but simply forgotten. This one is much easier to verify.
"was written and published hours before this demonstration" means that I have no prior knowledge about this demonstration. Otherwise you could argue that I have written the article to justify this demonstration.
Re: Andrew McCalip demonstrates synthesis of LK99
#24Earlier quoted context omitted.
pardon my ignorance but why are people posting nitter links every time, what is wrong with original twitter urls?
Twitter is basically broken if you don't login, compare this: https://twitter.com/andrewmccalip https://nitter.net/andrewmccalip In Twitter the latest tweet I see is from July, in Nitter is 22 minutes ago. Additionally in Twitter I get 3 notices/popups that I need to close.
I was not aware of this, I'm always logged in when I visit twitter
Re: Andrew McCalip demonstrates synthesis of LK99
#25His piece of LK-99 is much bigger than the tiny grains I've seen elsewhere.
It's made in USA baby!
Re: Andrew McCalip demonstrates synthesis of LK99
#26There is a Checz lab also documenting the process https://twitter.com/CondMatfyz
Czech
Re: Andrew McCalip demonstrates synthesis of LK99
#27Earlier quoted context omitted.
Clicked through 3 links to be greeted with "Disclaimer: I’m no physicist nor chemist...It turned out that LK folks were not talking about some stupid shit." -- combined with "(Note: was written and published hours before this demonstration.)", and there wasn't an attempt to explain the connection between TFA and this new other article I'm supposed to read. I'm good, thanks.
"I’m no physicist nor chemist" means that I have no qualification to say whether the theory is legitimate or not. "It turned out that LK folks were not talking about some stupid shit" means that their theory is not out of the thin air, but rather based on some alternative theory that has not been actually disproven but simply forgotten. This one is much easier to verify. "was written and published hours before this d…
The last point doesn't make much sense since there were multiple prior similar demonstrations. It's still a prediction made after the experiment has concluded and the results are widely disseminated.
Re: Andrew McCalip demonstrates synthesis of LK99
#28Earlier quoted context omitted.
Twitter is basically broken if you don't login, compare this: https://twitter.com/andrewmccalip https://nitter.net/andrewmccalip In Twitter the latest tweet I see is from July, in Nitter is 22 minutes ago. Additionally in Twitter I get 3 notices/popups that I need to close.
I was not aware of this, I'm always logged in when I visit twitter
And I'm not.
Re: Andrew McCalip demonstrates synthesis of LK99
#29I like the 2:35am timestamp
Re: Andrew McCalip demonstrates synthesis of LK99
#30Earlier quoted context omitted.
I don't understand what you're not seeing. Nobody is saying that the whole LK-99 sample is superconducting. Why would you expect the whole sample to float, instead of "partial floating" as we're seeing, if you have a material that's only partially superconducting?
I was wondering this, why do all the samples not completely float. If the sample is only partially superconducting, could you just smash it into smaller pieces and find a few floating ones? Or would the different domains be so small that you have to turn the sample into dust before you get a completely superconducting piece? Probably can not be answered in general as it heavily depends on the synthesis process?
洗芝溪 answered this on Zhihu. All his answers are extremely good. This user knows something.
这应该还是材料的各向异性, 也就是它的准一维结构导致. 因为材料当中有一个固定晶相, 那个方向的抗磁性最强, 所以磁感线总会沿着这个方向走, 导致所有样品都是竖起来的.
This should be due to the anisotropy of the material, that is, its quasi-one-dimensional structure. Because there is a fixed crystal phase in the material, that direction has the strongest diamagnetism, so the magnetic field lines will always go along this direction, causing all The samples are all upright.