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First claimed successful replication of LK-99 (twitter.com)

submitted 1 year ago by realherald@lemmy.world to c/technology@lemmy.world

58 comments fedilink hide all child comments

"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://arxiv.org/pdf/2307.16892.pdf Shenyang National Lab: https://arxiv.org/pdf/2307.16040.pdf "

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[–] rm_dash_r_star@lemm.ee 7 points 1 year ago* (last edited 1 year ago) (1 children)

A conductor with no resistance is a big deal for many electrical applications. Electrical resistance is often a big part of design. Removing that aspect changes things significantly. Electrical power losses and the size of conductors can be greatly reduced.

I've read lots of unsubstantiated claims about superconductors. A solution has to be producible in quantity at a reasonable cost. Otherwise it's not going to be a breakthrough. I mean we currently have expensive and bulky superconductor solutions, but they're limited to applications where it's reasonable such as MRI machines and particle accelerators.

An inexpensive room temperature superconductor would make the most difference in tech sectors such as power transmission, electromechanical, and power electronics. These are areas where power loss due to circuit resistance is a big part of design. The impact would be minimal for computing and logic. There may be areas where power loss can be reduced, but logic relies on semi-conductors which must have resistance to function, it's in the name. The term "semi" implies resistance.

[–] httpjames@sh.itjust.works 1 points 1 year ago (1 children)

Would this potential superconductor work in devices like phones and laptops? Would it lead to more efficient operation?

[–] rm_dash_r_star@lemm.ee 2 points 1 year ago

Would this potential superconductor work in devices like phones and laptops? Would it lead to more efficient operation?

If inexpensive it could be used in power components for consumer electronics like phones and laptops, but wouldn't make a huge difference since most of the power consumption occurs in chips and displays where superconductors wouldn't apply. Though it could lead to some reduction in size and better efficiency. Battery operated devices are considered low power. High power applications are where superconductors offer the most benefit.