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Condensed Matter > Superconductivity

arXiv:2307.12008 (cond-mat)
[Submitted on 22 Jul 2023]

Title:The First Room-Temperature Ambient-Pressure Superconductor

Authors:Sukbae Lee, Ji-Hoon Kim, Young-Wan Kwon
Download a PDF of the paper titled The First Room-Temperature
Ambient-Pressure Superconductor, by Sukbae Lee and 2 other authors
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    Abstract: For the first time in the world, we succeeded in
    synthesizing the room-temperature superconductor ($T_c \ge 400$
    K, 127$^\circ$C) working at ambient pressure with a modified
    lead-apatite (LK-99) structure. The superconductivity of LK-99 is
    proved with the Critical temperature ($T_c$), Zero-resistivity,
    Critical current ($I_c$), Critical magnetic field ($H_c$), and
    the Meissner effect. The superconductivity of LK-99 originates
    from minute structural distortion by a slight volume shrinkage
    (0.48 %), not by external factors such as temperature and
    pressure. The shrinkage is caused by Cu$^{2+}$ substitution of
    Pb$^{2+}$(2) ions in the insulating network of Pb(2)-phosphate
    and it generates the stress. It concurrently transfers to Pb(1)
    of the cylindrical column resulting in distortion of the
    cylindrical column interface, which creates superconducting
    quantum wells (SQWs) in the interface. The heat capacity results
    indicated that the new model is suitable for explaining the
    superconductivity of LK-99. The unique structure of LK-99 that
    allows the minute distorted structure to be maintained in the
    interfaces is the most important factor that LK-99 maintains and
    exhibits superconductivity at room temperatures and ambient
    pressure.

Subjects: Superconductivity (cond-mat.supr-con)
Cite as:  arXiv:2307.12008 [cond-mat.supr-con]
          (or arXiv:2307.12008v1 [cond-mat.supr-con] for this
          version)
          https://doi.org/10.48550/arXiv.2307.12008
          Focus to learn more
          arXiv-issued DOI via DataCite

Submission history

From: Young-Wan Kwon [view email]
[v1] Sat, 22 Jul 2023 07:51:19 UTC (2,620 KB)
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