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LK-99

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  • LK-99

    hard to be sure whats going on so just consider this a place holder but apparently some koreans just had a pretty significant breakthrough re superconducter tech.

    the upsides if it proofs out include things like hyper efficient energy grids, _very_ fast computer chips, mag trains, controlling fusion reactors, flying cars, so on.


  • #2
    Alien tech

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    • #3
      team in china claim they replicated the results of the paper


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      • #4
        What could go wrong????

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        • #5
          legendary:


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          • #6
            from the comments:

            Explained by GPT-4 bellow: This paper, titled "Origin of correlated isolated flat bands in copper-substitified lead phosphate apatite" by Sinead M. Griffin, discusses the recent interest in high-temperature superconductivity, specifically in copper-substituted apatite, also known as 'LK99'. The author uses density functional theory calculations to investigate this material and its potential for high-temperature superconductivity. The paper begins by discussing the importance of high-temperature superconductors in condensed matter physics and their potential applications for an energy-efficient future. The author notes that while significant strides have been made in the discovery and understanding of high-temperature superconductors, a definitive roadmap to achieving room-temperature superconductivity under ambient pressures remains elusive. The author then introduces the concept of apatites, which are materials with a general formula A10(TO4)6X2±x, where A = alkaline or rare earth metal; M = Ge, Si, or P; and X = halide, O, or OH. The author specifically focuses on the lead-phosphate apatite Pb10(PO4)6(OH)2. The author then discusses the substitution of Cu on a Pb(1) site resulting in CuPb9(PO4)6OH2, and the resulting changes to the structure. The author finds that the inclusion of Cu results in a global structural distortion that results in a change in coordination from nine to six. The author presents the calculated spin-polarized electronic structure and finds an isolated set of flat bands crossing the Fermi level, which is indicative of strongly correlated bands. The author suggests that the low-energy physics of this system can be described by a two-band dyz/dxz model, similar to that originally suggested for Fe-pnictide superconductors. However, unlike other correlated-d band superconductors, in this system the Cu-d bands are particularly flat. The author concludes by discussing the exchange interactions between Cu ions in different unit cells. The author finds a preference for ferromagnetic coupling in the out-of-plane direction and a preference for antiferromagnetic coupling in the in-plane direction. However, the author notes that this result is indicative of the potential exchange interactions in the system, but it relies on the unrealistic assumption that the Cu ions will sit on the same substitution position in each unit cell. In summary, this paper presents a theoretical investigation of copper-substituted lead phosphate apatite, a material of interest for high-temperature superconductivity. The author identifies correlated isolated flat bands at the Fermi level, a common signature of high transition temperatures in already established families of superconductors. The results suggest that a minimal two-band model can encompass much of the low-energy physics in this system. The implications of these results on possible superconductivity in Cu-doped apatite are discussed.

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            • #7

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              • #8
                chinese team just verified 0 resistance using the exact recipe provided in the korean paper.





                https://wccftech.com/here-are-all-of...uperconductor/

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                • #9

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