We have studied LK-99 [Pb_10−x Cu _x (PO₄)₆O], alleged by Lee et al to exhibit superconductivity above room temperature and at ambient pressure, and have reproduced all anomalies in electric and magnetic measurements that they reported as evidence for the claim of LK-99 being an ambient-pressure, room-temperature superconductor. We found that these anomalies are associated with the structural transition of the Cu₂S impurity in their sample and not with superconductivity.

中文翻译：

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LK-99 异常现象的复制和研究——所谓的环境压力、室温超导体

我们研究了 LK-99 [Pb _10−X 铜 _X (PO ₄ ) ₆ O]，李声称等人在室温以上和环境压力下表现出超导性，并重现了电磁测量中的所有异常现象，他们将这些异常报告作为 LK-99 是环境压力、室温超导体的证据。我们发现这些异常现象与样品中Cu ₂ S 杂质的结构转变有关，而不是与超导性有关。