7 ms·

Damn, why is nobody talking more about the theory of it? What I see to ponder: - (1970, brinkman, rice) "application of gutzwiller's variational method to the

by code51 3y ago

Damn, why is nobody talking more about the theory of it? What I see to ponder: - (1970, brinkman, rice) "application of gutzwiller's variational method to the metal-insulator transition" - (2001, hyun-tak kim) "extension of the brinkman-rice picture and the mott transition" - (2002, hyun-tak kim) "extended brinkman-rice picture and its application to high-Tc superconductors" - (2021, hyun-tak kim) "Room-temperature-superconducting Tc driven by electron correlation" even briefly reading relevant research (other than these papers) says even if a group could not replicate lk99 at first try, there's more to it. cooking the right way should be insanely difficult because this is a probabilistic event after all. should not be happening homogenously and should not be happening in a wide-band of parameters. I think the groups will eventually reach a narrow range of parameters to replicate but will take a lot of effort.

deleted 3y ago
[deleted]
dkqmduems 3y ago
The brinkman paper is interesting, but the others are a bit too hand wavy.
drtgh 3y ago
By the rumors that I read in forums, Sukbae Lee and Ji-Hoon Kim hit the first sample (the prototype of LK-99) in 1999 trying to prove the theory of their professor Choi Dong-Shik. Around 2017 YoungWan Kwon joined to the team and they got investment enough for to buy an SQUID and a EPR. In 2020, L and K hit with LK99. They tried to submit a paper to Nature, but was rejected. They contacted with HyunTak Kim after read his 2021 paper (the one you point), and HyunTak Kim joined to the team. The above are rumors. I'm not sure if such 2021 paper may give tips in the theory or synthesization behind LK99.
- LargeTomato 3y ago
  >They tried to submit a paper to Nature, but was rejected This should be "were rejected" because "were" refers to "they". It cannot refer to the paper even though that would make sense. You could say "but it was rejected" to force the sentence to refer to the singular paper.
  - LargeTomato 3y ago
    Okay, if we don't correct English on HN that's okay. My foreign friends ask me to do this with them but I get that HN is a different forum and that we are not friends.
    - undefinedland 3y ago
      There was nothing offensive or corrosive about the way you stated the correction so I don't see why you should be down voted; as someone who is learning a foreign language, I can say that having this kind of correction is useful. Rewarding the mob for its hysteria and stupidity by hiding away from them is the wrong move in my humble opinion; after all, you're only losing internet points which aren't real.
    - psychphysic 3y ago
      Don't pay too much attention to votes anyways you do you do long as you're politics and helpful (as you have been).
- lucubratory 3y ago
  Important additional rumours I heard from a little birdie: The Nature rejection was because of the Ranga Dias affair, and it wasn't an outright rejection but a requirement that the paper be submitted to a local journal and peer reviewed by local scientists before it would be considered. Before Kwon joined the team at LG's alleged insistence, the reason that Lee and Kim had restarted research at all was because Choi Dong-Shik had summoned them to his deathbed, and his dying wish was that they prove his theory right; Lee and Kim judged that LK-99 was the best candidate for doing so. If true, that is objectively insane. Imagine if we actually get RTAPS because of an old professor's dying wish, like something out of a fairytale.
  - nullc 3y ago
    > If true, that is objectively insane. I dunno about that. Look at it this way: we don't know how to make a room temp superconductor, we don't know how to learn what we need to learn to make one. There were some more obvious ideas, they didn't work. There were a lot of less obvious ideas, lots of people tried them, they didn't work. At this point, one could argue that continued research specifically directed to making a room temp superconductor, absent some kind of new externally originated discovery or a constraint relaxation (like ultra high pressure), is objectively a waste of time. So we should also expect that the discovery will either be a bit insane or will be a totally unexpected accident from unrelated work (why are my results weird? oh this drug I was testing turned out to be a superconductor!)-- and maybe a combination. Perhaps it turns out that the LK-99 sample is superconducting but due to some accidental impurity in their synthesis, for reasons totally unrelated to their expectations, perhaps one that would have been discovered before but most people making new ceramics aren't testing them for superconductivity. The sane people are busy making discoveries that if not quite guaranteed are at least in domains where many people haven't already failed.
    - rowanG077 3y ago
      How much money does actually go into this? I know it's an active research area, but I didn't get the idea this is some kind of "main" focus for humanity. For example a figure I could find is that US$24.5 billion is spend on cancer research (which frankly I find extraordinarily low). I couldn't find a figure online but I doubt it's even 10% of that. To me it just sounds more like we are just playing around a little bit and not actually taking finding a room temperature super conductor seriously.
harhargange 3y ago
By the looks of it, to me this is just the once in 5 years rumor cycle. The authors have been working on it for a long time and have been rejected by Nature. Other co-authors have said they weren't consulted before uploading the paper. The author who uploaded had to give a talk, and for whatever reason uploaded it on Arxiv before uploading, and didn't expect it would blow up like it has. For official confirmation of room temp superconductor, I would rather go with a big publishing journal group organising a press conference before paying any attention.

by code51 3y ago

deleted 3y ago

[deleted]

dkqmduems 3y ago

The brinkman paper is interesting, but the others are a bit too hand wavy.

drtgh 3y ago

By the rumors that I read in forums, Sukbae Lee and Ji-Hoon Kim hit the first sample (the prototype of LK-99) in 1999 trying to prove the theory of their professor Choi Dong-Shik. Around 2017 YoungWan Kwon joined to the team and they got investment enough for to buy an SQUID and a EPR. In 2020, L and K hit with LK99. They tried to submit a paper to Nature, but was rejected. They contacted with HyunTak Kim after read his 2021 paper (the one you point), and HyunTak Kim joined to the team. The above are rumors. I'm not sure if such 2021 paper may give tips in the theory or synthesization behind LK99.

LargeTomato 3y ago
>They tried to submit a paper to Nature, but was rejected This should be "were rejected" because "were" refers to "they". It cannot refer to the paper even though that would make sense. You could say "but it was rejected" to force the sentence to refer to the singular paper.
- LargeTomato 3y ago
  Okay, if we don't correct English on HN that's okay. My foreign friends ask me to do this with them but I get that HN is a different forum and that we are not friends.
  - undefinedland 3y ago
    There was nothing offensive or corrosive about the way you stated the correction so I don't see why you should be down voted; as someone who is learning a foreign language, I can say that having this kind of correction is useful. Rewarding the mob for its hysteria and stupidity by hiding away from them is the wrong move in my humble opinion; after all, you're only losing internet points which aren't real.
  - psychphysic 3y ago
    Don't pay too much attention to votes anyways you do you do long as you're politics and helpful (as you have been).
lucubratory 3y ago
Important additional rumours I heard from a little birdie: The Nature rejection was because of the Ranga Dias affair, and it wasn't an outright rejection but a requirement that the paper be submitted to a local journal and peer reviewed by local scientists before it would be considered. Before Kwon joined the team at LG's alleged insistence, the reason that Lee and Kim had restarted research at all was because Choi Dong-Shik had summoned them to his deathbed, and his dying wish was that they prove his theory right; Lee and Kim judged that LK-99 was the best candidate for doing so. If true, that is objectively insane. Imagine if we actually get RTAPS because of an old professor's dying wish, like something out of a fairytale.
- nullc 3y ago
  > If true, that is objectively insane. I dunno about that. Look at it this way: we don't know how to make a room temp superconductor, we don't know how to learn what we need to learn to make one. There were some more obvious ideas, they didn't work. There were a lot of less obvious ideas, lots of people tried them, they didn't work. At this point, one could argue that continued research specifically directed to making a room temp superconductor, absent some kind of new externally originated discovery or a constraint relaxation (like ultra high pressure), is objectively a waste of time. So we should also expect that the discovery will either be a bit insane or will be a totally unexpected accident from unrelated work (why are my results weird? oh this drug I was testing turned out to be a superconductor!)-- and maybe a combination. Perhaps it turns out that the LK-99 sample is superconducting but due to some accidental impurity in their synthesis, for reasons totally unrelated to their expectations, perhaps one that would have been discovered before but most people making new ceramics aren't testing them for superconductivity. The sane people are busy making discoveries that if not quite guaranteed are at least in domains where many people haven't already failed.
  - rowanG077 3y ago
    How much money does actually go into this? I know it's an active research area, but I didn't get the idea this is some kind of "main" focus for humanity. For example a figure I could find is that US$24.5 billion is spend on cancer research (which frankly I find extraordinarily low). I couldn't find a figure online but I doubt it's even 10% of that. To me it just sounds more like we are just playing around a little bit and not actually taking finding a room temperature super conductor seriously.

harhargange 3y ago

By the looks of it, to me this is just the once in 5 years rumor cycle. The authors have been working on it for a long time and have been rejected by Nature. Other co-authors have said they weren't consulted before uploading the paper. The author who uploaded had to give a talk, and for whatever reason uploaded it on Arxiv before uploading, and didn't expect it would blow up like it has. For official confirmation of room temp superconductor, I would rather go with a big publishing journal group organising a press conference before paying any attention.