Post AY8ZMeWPuIrM2QbR9k by weekend_editor@mathstodon.xyz
 (DIR) More posts by weekend_editor@mathstodon.xyz
 (DIR) Post #AY5cyfyGgTl1vQZZgW by cstross@wandering.shop
       2023-07-26T12:37:53Z
       
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       If this is reproducable it may turn out be the most important news of the decade when the history books are written (ambient temperature and pressure superconductor—superconductivity due to crystal structure deformation, Curie temperature 400 K/127 ℃): https://arxiv.org/abs/2307.12008
       
 (DIR) Post #AY5cygdkCGw003yhKi by icedquinn@blob.cat
       2023-07-26T15:04:27.331223Z
       
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       @cstross :blobcatthonkang: I thought grapheme was already a superconductor
       
 (DIR) Post #AY8ZMdlygxiFiOsLlw by weekend_editor@mathstodon.xyz
       2023-07-26T17:12:54Z
       
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       @cstross There's a follow-up paper now, somewhat more formal and with more detail:https://arxiv.org/abs/2307.12037Notably, there is no resistivity-vs-temperature curve in the paper.  OTOH, it's been pointed out that a lot of the rigs used for this sort of thing top out at 400K, and they're claiming Tc > 400K.Intriguingly, it's a lead-copper-phosphorous-oxygen molecule in a copper cladding (to stress the xtal a certain way).  That means the materials are commonly available (no unobtainium rare earths, for example).Still... everybody's rushing to cook their own and test it independently.  I have scars from believing too hard when the cold fusion thing happened back in the 80s.
       
 (DIR) Post #AY8ZMeWPuIrM2QbR9k by weekend_editor@mathstodon.xyz
       2023-07-27T19:50:35Z
       
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       @cstross Worked my way through the first paper, and so far so good: near-vanishing resistivity, measured critical current and critical magnetic field, some Meissner effect and a mechanism that looks like Josephson junctions.Now working on 2nd paper, which DOES seem to have a resistivity vs temp curve, indicating Tc at about 120 C = 393 K.Will synthesize some sort of summary on blog soon.Right now, it all has the air of a rush job: figures misnumbered, odd turns of phrase, some error msgs from citation software (in Korean), slightly different materials manufacture recipes each time (because they're just learning how to make it).That makes sense for a very early result.All declared funding looks like Korean academic research funding.
       
 (DIR) Post #AY8ZMfDJKpAeBSfh0y by pthenq1@mastodon.la
       2023-07-28T01:08:07Z
       
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       @weekend_editor @cstross Cc @SeverianX