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It's as close to official as we'll probably get: LK-99 is likely simply a ferromagnetic material, which explains its levitating properties, according to new research from Peking University.
The room temperature superconductivity revolution will have to wait another day.
The room temperature superconductivity revolution will have to wait another day.
Guo et. al synthesized #LK99 with the published methodology and matched the material composition to the original using X-Ray Diffraction. They observed levitation in the sample and conducted a litany of other tests.
Their findings conclusively prove that their sample (which seems similar in many respects to LK-99) is NOT a superconductor. In fact, it's one of the least encouraging (and cleanest) resistivity plots we've seen so far.
So why does it (half) float? The authors describe it simply: "We therefore conclude that the half levitation is caused
by a magnetic torque, rather than by a net lifting force exerted on the sample."
by a magnetic torque, rather than by a net lifting force exerted on the sample."
Congratulations on a likely conclusive piece of research to Kaizhen Guo, Yuan Li, and Shuang Jia at Peking University. This is how science works!
I encourage you to read their excellent paper for yourself and see if you come to the same conclusion. arxiv.org/abs/2308.03110
I encourage you to read their excellent paper for yourself and see if you come to the same conclusion. arxiv.org/abs/2308.03110
For me, it's on to coffee! I have a great story coming up about the hardest test I've ever taken - the Q Coffee Grader. I hope you enjoy, and we'll still get to discuss interesting new topics in science and physics regularly!
You couldn’t have scripted it much better:
https://twitter.com/alexkaplan0/status/1688754776199020544
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