First order transition in [LK-99] containing Cu2S

#1

Post by iflp » Wed, Aug 09, 2023, 2:28 AM UTC

First order transition in [LK-99] containing Cu2S
arxiv.org

Re: First order transition in [LK-99] containing Cu2S

#2

Post by iflp » Wed, Aug 09, 2023, 2:35 AM UTC

> The superconducting-like behavior in LK-99 most likely originates from a magnitude reduction in resistivity caused by the first-order structural phase transition of Cu2S. [...] It is important to note that this first-order structural transition differs significantly from the second-order superconducting transition.

Re: First order transition in [LK-99] containing Cu2S

#3

Post by carabiner » Wed, Aug 09, 2023, 5:05 AM UTC

I think this puts the nail in the coffin. It's over. However, gentlemen, shitposting with you during this whole travesty of science has been the greatest honor of my life.

Re: First order transition in [LK-99] containing Cu2S

#4

Post by semajian » Wed, Aug 09, 2023, 5:40 AM UTC

A quick look at the plots make me think this paper is legit and lk-99 is not a superconductor. Nice plots covering down to low temperature, unlike the original lk-99 papers which always seemed bizarre to me.

Re: First order transition in [LK-99] containing Cu2S

#5

Post by Gravityloss » Wed, Aug 09, 2023, 5:53 AM UTC

https://twitter.com/sanxiyn/status/1689151051239399424?t=12F...

Says patent shows three transitions.

Re: First order transition in [LK-99] containing Cu2S

#6

Post by aappleby » Wed, Aug 09, 2023, 7:13 AM UTC

carabiner wrote: post #3

I think this puts the nail in the coffin. It's over. However, gentlemen, shitposting with you during this whole travesty of science has been the greatest honor of my life.

Science that proves something doesn't work is not a travesty.

Re: First order transition in [LK-99] containing Cu2S

#7

Post by remarkEon » Wed, Aug 09, 2023, 7:25 AM UTC

aappleby wrote: post #6

carabiner wrote: post #3

I think this puts the nail in the coffin. It's over. However, gentlemen, shitposting with you during this whole travesty of science has been the greatest honor of my life.

Science that proves something doesn't work is not a travesty.

OP is making a joke (the "it's over" vs "we're so back" meme).

Re: First order transition in [LK-99] containing Cu2S

#8

Post by junon » Wed, Aug 09, 2023, 8:08 AM UTC

Is this based on a sample from the original lab or a new sample they synthesized?

Re: First order transition in [LK-99] containing Cu2S

#9

Post by Levitating » Wed, Aug 09, 2023, 10:35 AM UTC

Interestingly Iris Alexandra suggested the levitation of LK-99 could be attributed to Cu2S before:

https://www.nextbigfuture.com/2023/08/iris-alexander-better-...

Re: First order transition in [LK-99] containing Cu2S

#10

Post by rsfern » Wed, Aug 09, 2023, 10:53 AM UTC

junon wrote: post #8

Is this based on a sample from the original lab or a new sample they synthesized?

Samples they synthesized. At the end of the paper they recommend the LK team do the same measurements. As far as I know there are still no independent reports on the original sample