![]() ![]() Once the findings are published in a peer-reviewed journal, which Kim says is in the works, he will support anyone who wants to create and test LK-99 for themselves. Kim says that he is aware of the scepticism but believes that other researchers should try to replicate his team’s work to settle the issue. The theoretical models that Kim and his colleagues cite as explaining why the new material can superconduct at such different conditions than all previous ones have also been called into question by one of the researchers that New Scientist spoke to. Some raised concern that some of the results could be explained by errors in experimental procedure combined with imperfections in the LK-99 sample. Other experts that New Scientist consulted were similarly sceptical about the results and the data produced. ![]() “So it is too early to say that we have been presented with compelling evidence for superconductivity in these samples,” she says. Susannah Speller and Chris Grovenor at the University of Oxford say that when a material becomes superconductive, there should be clear signatures of that in a number of measurements.įor two of those in particular, namely the response to a magnetic field and a quantity called heat capacity, Speller says neither is demonstrated in the data. Some commentators on social media heralded the findings as a generational breakthrough, but the overwhelming response from researchers with expertise in superconductivity has been largely sceptical. Truly convenient materials that can conduct electricity perfectly have long been sought after by researchers, but their history is one of difficult experiments, theoretical puzzles and scientific controversy Room-temperature superconductors: Here's everything you need to know ![]() In that paper, the work is described as opening a “new era for humankind”. Kim has only co-authored one of the arXiv papers, while the other is authored by his colleagues at the Quantum Energy Research Centre in South Korea, some of whom also applied for a patent on LK-99 in August 2022.īoth papers present similar measurements, however Kim says that the second paper contains “many defects” and was uploaded to arXiv without his permission. Kim says this is due to the sample being imperfect, which means that only some part of it becomes superconductive and exhibits the Meissner effect.Ĭurrently, two papers concerning LK-99 are available on the preprint service arXiv, which does not conduct peer review, and a related past study was published in the Journal of the Korean Crystal Growth and Crystal Technology in April. However, only one edge of the flat, coin-like material fully levitates, while the other seems to stay in contact with the magnet. In their video, they placed a piece of LK-99 above a magnet and it clearly rises above the magnet’s surface. They concluded that it did exhibit this effect in the temperature range where it also had near zero resistance.īecause of the Meissner effect, a superconductor floats when placed on a conventional magnet and the researchers recorded a test of this levitation as well. The researchers also tested the material’s response to a magnetic field at a range of temperatures because superconductors are known to expel them as part of a phenomenon called the Meissner effect. ![]()
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