Electronic Structure of LK-99

Post by ifyoubuildit » Wed, Aug 02, 2023, 9:47 PM UTC

groby_b wrote: post #423

ifyoubuildit wrote: post #410

Earlier quoted context omitted.

> Who did let us down: the people that were making things worse from day #1 by stirring the pot against science. What is the solution to this? The framing seems way too simplistic to ever be useful. It makes it seem as though there was just the Good side that had all the answers all along, and the Bad side who just needed to do what the Good side said. In reality, it all came down to "who do you trust to both have yo…

"It makes it seem as though there was just the Good side that had all the answers all along" That, right there, is where so many people went wrong and what was blatantly exploited by grifters up and down the chain. The side of science didn't "have answers all along", but it was willing to learn and change. And no, it wasn't "boo science". It was, to a large extent, political maneuvering using science as a convenient…

Post by overnight5349 » Wed, Aug 02, 2023, 10:23 PM UTC

bluecoconut wrote: post #93

jpmattia wrote: post #69

Earlier quoted context omitted.

> These Cu d-d interactions right at the fermi energy give me huge hope. Feels very familiar to other superconductors (re: all the cuprates). As someone who is versed in semiconductor band structures but not superconductor band structures: What is it about Cu d-d interactions that causes the superconductivity? Degenerate energies in semiconductors don't give rise to electron pairing, so I'm a bit out to sea with the…

To be honest, this is a hunch thing more than a I can teach and explain it thing. To me it's just "a lot of the same stories" that are told about cuprates, and less of a "I can explain the mechanism". Roughly, one of the "properties" that shows up with these materials is that the 3d orbitals of coper atoms are involved in forming the bands near the fermi level. Couple that with the fun story of Cu electron configurat…

Post by fragmede » Wed, Aug 02, 2023, 10:34 PM UTC

fragmede wrote: post #234

serf wrote: post #170

Earlier quoted context omitted.

> I despise generative LLMs and avoid using them at every opportunity. why? it's just a tool. despise how it was released, how it was trained, the people that operate it , whatever, but I can't really understand why someone would 'despise' a wrench -- even if it was used really poorly and produced by a shady company with a checkered past.

Same concept as blood money. To be dramatic, if the wrench was made with ore from a mine where your father worked, and he was killed and the ore was stolen, would you do business with the company that hired the mercenaries that killed him? Would you buy a wrench from them? if one fell into your hands, would you use it? It's just a wrench, after all, but you can see why somebody might have strong feelings about it, ev…

Post by oceanghost » Wed, Aug 02, 2023, 11:44 PM UTC

whatshisface wrote: post #233

oceanghost wrote: post #150

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A diamagnetic material. "In simple terms, diamagnetic materials are substances that are usually repelled by a magnetic field. Electrons in an atom revolve around the nucleus, and thus possess orbital angular momentum. The resultant magnetic momentum in an atom of the diamagnetic material is zero."

I think ChatGPT wrote that because it is nonsense.

Post by throwawaylinux » Thu, Aug 03, 2023, 12:05 AM UTC

swat535 wrote: post #345

throwawaylinux wrote: post #218

Earlier quoted context omitted.

Despite the the "strictly no jesting on the super serious hacker news" rule, I think it was just a joke. I wouldn't let it get to you too much. I thought it was pretty funny.

Honestly I don’t find those kind of comments particularly valuable on HN. It derails the topic from a meaningful discussion and the whole thing devolves into a Reddit troll fest. All you need to do is glimpse at the replies it spawned to confirm it. This is why I assume it was heavily downvoted.