Superconductivity is a phenomenon in which a material can conduct electricity without any resistance or energy loss. It has many potential applications, such as powerful magnets, efficient power transmission, quantum computing and levitating trains. However, most superconductors only work at extremely low temperatures, requiring expensive and complex cooling systems.
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For decades, scientists have been searching for a material that can exhibit superconductivity at room temperature, or above 0 °C (273 K; 32 °F). Such a material would be a game-changer for many fields of science and technology, as it would eliminate the need for cooling and enable new possibilities for innovation.
Recently, a team of researchers from South Korea claimed that they have achieved this long-sought goal. In a paper published on the preprint server arXiv, they reported that they have synthesized a room-temperature superconductor (T_c ≥ 400 K, 127 °C) that works at ambient pressure. The material is a modified lead-apatite (LK-99) structure, which is derived from a mineral commonly used in ceramics and fertilizers.
The researchers said that they have verified the superconductivity of LK-99 by measuring its critical temperature (T_c), zero-resistivity, critical current (I_c), critical magnetic field (H_c), and the Meissner effect, which is the expulsion of magnetic fields from a superconductor. They also proposed a new model to explain the origin of superconductivity in LK-99, which involves minute structural distortions caused by copper substitution of lead ions in the insulating network of the material.
![](https://seedstint.com/wp-content/uploads/2023/07/Superconductivity1-1024x960.jpg)
If confirmed by independent experiments, this discovery would be a major breakthrough in physics and materials science. It would also challenge the existing theories of superconductivity, which predict that such high-temperature superconductors are unlikely to exist or require very high pressures to stabilize.
However, the claim of room-temperature superconductivity is not without controversy. Some experts have expressed doubts about the validity and reproducibility of the results, as well as the quality and integrity of the data. For instance, Ranga Dias, a physicist at the University of Rochester in New York who has made similar claims in the past, has faced allegations of plagiarism, data fabrication and retraction. Moreover, some critics have pointed out that the arXiv paper has not been peer-reviewed or published in a reputable journal yet.
Therefore, more rigorous and independent tests are needed to verify or falsify the claim of room-temperature superconductivity by the Korean team. Until then, it remains an exciting but uncertain possibility that could revolutionize our understanding and use of electricity.
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