Earlier quoted context omitted.
More specifically they agree with another similar paper from Stanford's Sinead Griffin https://arxiv.org/abs/2307.16892
Berkeley's Sinead Griffin.
Whoops!
Electronic Structure of LK-99
11–20 of 448 posts
Re: Electronic Structure of LK-99
#12I got my PhD studying band structure of high-tc superconductors (experimentalist, ARPES). These Cu d-d interactions right at the fermi energy give me huge hope. Feels very familiar to other superconductors (re: all the cuprates). (Note: I specifically worked in a lab that was measuring a lot of the d-wave character / gap-energies of various superconductors)
All in all, I'm now much more bullish on LK-99 being real superconductivity after seeing multiple different labs compute similar band structures. The video of multiple directions of magnet showing some levitation also inspires a lot of hope.
Re: Electronic Structure of LK-99
#13Earlier quoted context omitted.
> If doped such an electronic structure [LK-99] might support flat-band superconductivity or an correlation-enhanced electron-phonon mechanism, whereas a diamagnet without superconductivity appears to be rather at odds with our results. Sounds like it, if prepared right it could be a super conductor and would NOT be a diamagnet that would display the properties we saw in those videos.
This could also explain why the original authors themselves say they can only make it successfully around 1/10 times. The stars need to align.
Do you have a source for the original authors making a statement on that?
Re: Electronic Structure of LK-99
#14Earlier quoted context omitted.
> If doped such an electronic structure [LK-99] might support flat-band superconductivity or an correlation-enhanced electron-phonon mechanism, whereas a diamagnet without superconductivity appears to be rather at odds with our results. Sounds like it, if prepared right it could be a super conductor and would NOT be a diamagnet that would display the properties we saw in those videos.
This could also explain why the original authors themselves say they can only make it successfully around 1/10 times. The stars need to align.
That’s not unsurprising when it comes to a lot of research. The bench scientists I know often struggle with yield rates and labs have special knowledge about their particular set up when it comes to getting stuff to work.
Even in robotics (my area), if you are watching a video of a robot doing something cool, there’s often a bunch of times they ran the same demo and it didn’t work for some (often largely irrelevant to the main idea) reason. I also remember, in an undergrad analog circuits class, we had to build an amplifier on a breadboard with certain performance specs (e.g., a fairly high cut off frequency, etc.). This ended up being fairly difficult due to the tolerances in the components to which we had access and breadboard parasitics. I recall getting a non-trivial performance boost by swapping out a dozen 2n2222’s until we found “a good one.” The gray beard professor laughed and said that’s an expected part of our practical education.
Re: Electronic Structure of LK-99
#15So theorically they agree with LK-99 reaching superconductivity?
I am a PhD student in Physics, but I am no expert in condensed matter physics (I do research in computational NMR). Based on my experience with theorists and simulation researcher, I am a bit concerned with anchoring bias and the speed at which simulation papers are being published here. Then again, I don't know exactly what kind of research steps they follow to do their research.
I don't know why anyone should be concerned about anything here, unless you want immediate confirmation.
It's a process. Scientists will try to replicate and try to simulate and try to reason theoretically. They are bound to make mistakes but all of this can be critiqued and iterated on.
Again, there's no problem unless you need immediate confirmation or you think chasing this idea is a waste of time.
Enjoy the ride :)
Re: Electronic Structure of LK-99
#16The most interesting phenomenon revealed so far is that the room-temperature superconductor people and the generative-LLMs-are-God people draw on the same limited global pool of credulity, such that HN cannot be flooded with both ChatGPT worship and superconductor speculation at the same time.
Re: Electronic Structure of LK-99
#17I got my PhD studying band structure of high-tc superconductors (experimentalist, ARPES). These Cu d-d interactions right at the fermi energy give me huge hope. Feels very familiar to other superconductors (re: all the cuprates). (Note: I specifically worked in a lab that was measuring a lot of the d-wave character / gap-energies of various superconductors) All in all, I'm now much more bullish on LK-99 being real su…
So happy to hear this. I've been hoping for some sort of breakthrough ever since I first encountered footage of magnets falling through Cu tubes at an extremely leisurely pace.
Re: Electronic Structure of LK-99
#18Earlier quoted context omitted.
More specifically they agree with another similar paper from Stanford's Sinead Griffin https://arxiv.org/abs/2307.16892
I think she's working in a UC Berkeley Lab
No, Lawrence Berkeley National Lab, which is Up the Hill from Berkeley. They're run by the same underlying organization but are distinct (yet overlapping in many ways). LBL evolved out of the UC Berkeley Rad Lab, run by Earnest O. Lawrence (same name as the current lab). They do non-classified research.
There is also Lawrence Livermore National Lab, which is nearby, but in Livermore. They do classified research in addition to non-classified. I suppose it's one of the two places they simulate nuclear weapons... errr, run large scale multi-physics combustion codes for stockpile stewardship.
Re: Electronic Structure of LK-99
#19The most interesting phenomenon revealed so far is that the room-temperature superconductor people and the generative-LLMs-are-God people draw on the same limited global pool of credulity, such that HN cannot be flooded with both ChatGPT worship and superconductor speculation at the same time.
the singularity isn't going to implement itself, you know.
Re: Electronic Structure of LK-99
#20This ongoing research saga pretty much the most excited I’ve been about anything since before Covid. It feels like the science equivalent of watching your favorite sports team on an epic rise towards winning a world championship.
Even if this turns out to flop, I hope history remembers the original authors favorably. They really did find something that by all accounts could plausibly be a room temp superconductor. And of course this seems to have turned over quite a stone. Peripheral research as a result of this will likely continue for years, even if superconductivity is disproven.