The Condensed Matter Theory Center still needs to see conclusive LK99 Superconductivity evidence.
The situation is promising and hopeful but we are not definitively in the age of room temperature superconductors yet.
Several groups have made LK99, most impressively in a 'garage' in LA under live streaming, here is the first arXiv-posted 'synthesis', but these reproductions mean little since an alloy of Pb/Cu/P/O is fragile and may have different forms/propertieshttps://t.co/Mx0haHljWp
— Condensed Matter Theory Center (@condensed_the) August 1, 2023
As expected, there have been band structure calculations reported https://t.co/Kj9NldOeyRhttps://t.co/B8xfgUqGN1
The relevant bands are 'flat' within 1000K–one paper is very detailed, and provides LDA+ U results finding that the Hubbard-U broadens the relevant bands! pic.twitter.com/UDFj05A0vZ— Condensed Matter Theory Center (@condensed_the) August 1, 2023
We have seen nothing to change our original prognosis. One of the original papers (with 6 authors) got reposted in a revised form, but the changes seem minimal, and the paper still remains obscure and unconvincing (but not necessarily incorrect). We must wait for outside SC data
— Condensed Matter Theory Center (@condensed_the) August 1, 2023
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This paper from 2018 – key concept is this “percolation” where a “sample-spanning cluster” of superconducting grains forms a network channel in the material like water going through soil.
Obviously, I’ve looked down the rabbit hole a bit. Thought this was interesting. Kind of explains the “flicker” of superconductivity and transition at 110K.
Still holding much hope the coming laser focus on this will lead to a superconducting paper weight on my desk before I retire.
https://www.nature.com/articles/s41467-018-06707-y