Yesterday I tried unsuccessfully to write a python code for the erstwhile MU Puzzle and twice my laptop hung up somehow. Gave "memory error". Need to find a simpler approach.
In simpler terms what it means is LK-99 is a potential room-temperature superconductor that has not yet been fully verified. However, the recent replication of the material by a team at the Huazhong University of Science and Technology is a promising step forward. 👍
First claimed successful replication of LK-99
Accomplished by a team at the Huazhong University of Science and Technology and posted 30 minutes ago.
Why this is evidence:
The LK-99 flake slightly levitates for both orientations of the magnetic field, meaning it is not simply a magnetized piece of iron or similar 'magnetic material'. A simple magnetic flake would be attracted to one polarity of the strong magnet, and repelled by the other. A diamagnet would be repelled under either orientation, since it resists and expels all fields regardless of the polarity.
Caveats
There is no way to verify the orientation of the strong magnet in this video, also, there are yet to be published experimental measured values of this sample. Diamagnetism is a property of superconductors but without measured and verified data, this is just suggestive of a result.
Take-away
If this synthesis was indeed successful, then this material is easy enough to be made by labs other than the original research team. I would watch carefully for results out of Argonne National Lab, who are reported to be working on their own synthesis of a sample.
This overall corroborates two independent simulation studies that investigated the original Korean authors claim about material and crystal structure, and both studies supported the claims.
Lawrence Berkeley National Lab: https://t.co/1Blls3VcgL
Shenyang National Lab: https://t.co/I0NHAP3KsR
The attached video shows a small flake of their sample responding to an external magnetic field. I scroll through the video to skip to the relevant part.
original video credit to: @altryne
@SkylerStarking @FenixFve@Andercot Like water is a diamagnetic material, but it is not a superconductor. However, some diamagnetic materials, such as mercury, become superconductors when they are cooled to very low temperatures.
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