https://www.nature.com/articles/d41586-023-02585-7
Nature今天發表了關於韓國LK-99 超導體的文章
文章標題:
LK-99 isn’t a superconductor — how science sleuths solved the mystery
LK-99 不是超導體- 科學偵探如何破解這個謎團
Researchers seem to have solved the puzzle of LK-99. Scientific detective work has unearthed evidence that the material is not a superconductor, and clarified its actual properties.
研究人員似乎已經破解了LK-99之謎，科學探索的工作已然發現了這個材料不是超導體的證據，並揭示了其實際的特性。
The conclusion dashes hopes that LK-99 — a compound of copper, lead, phosphorus and oxygen — marked the discovery of the first superconductor that works at room temperature and ambient pressure. Instead, studies have shown that impurities in the material — in particular, copper sulfide — were responsible for the sharp drops in electrical resistivity and partial levitation over a magnet, which looked similar to properties exhibited by superconductors.
這個結論讓LK-99(一種銅、鉛、磷和氧的化合物)是第一個在室溫常壓下工作的超導體的希望破滅了。
研究表明，材料中的雜質(尤其是硫化銅)會導致電阻劇烈下降和磁體上的部分懸浮，這看起來與超導體的特性相似。
“I think things are pretty decisively settled at this point,” says Inna Vishik, a condensed-matter experimentalist at the University of California, Davis.
加州大學Davis分校的凝聚態實驗物理學家 Inna Vishik 表示：“我認為事情在此時已經相當明瞭了。”
The LK-99 saga began in late July, when a team led by Sukbae Lee and Ji-Hoon Kim at the Quantum Energy Research Centre, a start-up firm in Seoul, published preprints1,2 claiming that LK-99 is a superconductor at normal pressure and temperatures up to at least 127 ºC (400 kelvin). All previously confirmed superconductors function only at extreme temperatures and pressures.
這個關於LK-99的故事始於7月底，首爾一家初創公司量子能源研究中心的 Sukbae Lee 和 Ji-Hoon Kim 帶領的團隊發表了預印本，聲稱 LK-99 是一種在常壓和溫度至少達到127 ℃(400K)下運作的超導體。 以往的超導體都要在極端的溫度與壓力下才能運作。
The extraordinary claim quickly grabbed the attention of the science-interested public and researchers, some of whom tried to replicate LK-99. Initial attempts did not see signs of room-temperature superconductivity, but were not conclusive. Now, after dozens of replication efforts, many experts are confidently saying that the evidence shows LK-99 is not a room-temperature superconductor. (Lee and Kim’s team did not respond to Nature’s request for comment.)
這個驚奇的說法很快引起了對科學感興趣的群眾和研究人員的注意，有些人試著複現 LK-99。 最初的嘗試沒有室溫超導體的跡象，但沒有得出結論。 如今經過了數十次的努力複現，許多專家自信的表示，證據表明LK-99不是室溫超導體。 （李和金的團隊還沒有回應Nature雜誌的置評請求）
...... 接下去就是世界各國的研究機構的論文整理，有興趣可以自己到網站上看