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[2307.12008] The First Room-Temperature Ambient-Pressure Superconductor

arxiv.org · 5,847 words · saved by 2 readers

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.

The First Room-Temperature Ambient-Pressure Superconductor Sukbae Lee1*, Ji-Hoon Kim1, Young-Wan Kwon2† 1 Quantum Energy Research Centre, Inc., (Q-centre, Inc.), B1, 46-24, Songi-ro 23 gil, Songpa-gu, Seoul 05822, Korea 2 KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea Abstract For the first time in the world, we succeeded in synthesizing the room-temperature superconductor (Tc ≥ 400 K, 127 oC) working at…

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