[Rockhounds] Superconductivity

[Paul]

In superconductivity
http://rockhounds.drizzle.com/pipermail/rockhounds_rockhounds.drizzle.com/2023-August/003361.html 
,
Jeffrey Joy wrote:

 >...
 >there is some sort of superconductivity going on here
 >and if it can be manufactured at scale, it could be as
 >revolutionary as semiconductors were to electronics.
 >Let's keep our fingers crossed!

Some preprints online are:

Kumar, K., Karn, N.K. and Awana, V.P.S., 2023.
Synthesis of possible room temperature superconductor
LK-99: Pb $ _9 $ Cu (PO $ _4 $) $ _6 $ O.
arXiv preprint arXiv:2307.16402.
https://arxiv.org/pdf/2307.16402

Lee, S., Kim, J.H. and Kwon, Y.W., 2023. The
First Room-Temperature Ambient-Pressure
Superconductor. arXiv preprint arXiv:2307.12008.
https://arxiv.org/pdf/2307.12008

Lai, J., Li, J., Liu, P., Sun, Y. and Chen, X.Q., 2023.
First-principles study on the electronic structure of
Pb $ _ {10-x} $ Cu $ _x $(PO $ _4 $) $ _6 $ O ($ x $= 0, 1).
arXiv preprint arXiv:2307.16040.
https://arxiv.org/pdf/2307.16040

Lee, S., Kim, J., Kim, H.T., Im, S., An, S. and Auh,
K.H., 2023. Superconductor Pb_ {10-x} Cu_x (PO_4) _6O
showing levitation at room temperature and
atmospheric pressure and mechanism.
arXiv preprint arXiv:2307.12037.
https://arxiv.org/pdf/2307.12037

And there is:

LK-99 Superconductor: Maybe a Breakthrough,
Maybe Not So Much. Experts are pushing back
against extraordinary claims of a room-temperature
superconductor. Here's what the lab results mean
and why we need time to sort things out. CNET
https://www.cnet.com/tech/computing/lk-99-superconductor-maybe-a-breakthrough-maybe-not-so-much/

Inside the DIY Race to Replicate LK-99
Experts doubt claims that LK-99 is a room-temperature
superconductor set to open up a future of levitating
trains and quantum tech. Andrew McCalip wants to
  see for himself. Wired Magazibe, Agust 2, 2023
https://www.wired.com/story/inside-the-diy-race-to-replicate-lk-99/

LK-99 and the Desperation for Scientific Discovery
Analysis by Tim Culpan, Bloomberg, Washington Post
https://www.washingtonpost.com/business/energy/2023/08/02/lk-99-and-the-desperation-for-scientific-discovery/74c4f774-317a-11ee-85dd-5c3c97d6acda_story.html

Yours,

Paul H.