Seems to be the same one that had a video a couple of days ago https://news.ycombinator.com/item?id=36953396
Back then, many asked if this was superconduction or merely diamagnetism. Does the new paper shine any light on this question?
Back then, many asked if this was superconduction or merely diamagnetism. Does the new paper shine any light on this question?
ETA: also, in the presence of a magnetic field, that transition temperature decreases. That's pretty huge. Unless this paper is fraudulent, I take this as the biggest positive evidence so far that something besides simple diamagnetism is going on. And, cards on table, with the assumption that the paper is not fraudulent, this pushes my odds above 50% for the first time.
It definitely contributes to the general feel that however this works, it's an inefficient synthesis that's problematically generating the material we want.
It certainly makes me wonder if something like molecular-beam epitaxy would be able to directly grow a more pure sample (but I imagine that's expensive and time-consuming to setup, plus not really what we're hoping for if we want to use lots of it).
Wow.
For instance:
https://www.researchgate.net/figure/Temperature-variation-of...
So...no.
> if the current record were to be decertified then the holder would be a tie at 54.0 °C (129.2 °F), recorded both at Furnace Creek and in Kuwait.
https://en.wikipedia.org/wiki/Highest_temperature_recorded_o...
Any speculation if that’s consumer, commercial, or industrial off-the-shelf?
Sounds like we may be talking running an MRI off of a mini split system.
Time for you to make some money then? :D
https://polymarket.com/event/is-the-room-temp-superconductor...
This is a pretty strict version, at 33% now by 2025
https://manifold.markets/QuantumObserver/will-the-lk99-room-...
There are also the prediction ... platforms Metaculus and Manifold, which are legal in the US, since they only use made-up internet points instead of real money. I'm not sure whether this even hurts their accuracy compared to Polymarket though.
The sportsbook argument was that sports betting involves more than random chance - knowledge of the game, the players, etc. effectively turn it into a matter of skill.
I doubt there are enough interested parties to bother for prediction markets, though.
Did that site predate https://xkcd.com/955/ or was it inspired by it?
[1] https://www.sciencedirect.com/science/article/abs/pii/S09258...
First it shows a temperature graph vs moment, as they heat it it loses the diamagnetism around the temperature LK99 is said to be superconducting.
Second only a superconductor will have net-zero field, which means "stable" levitation. In the video they approach the sample with the magnet and flip it while the piece is mostly "in place". A regular diamagnet generates a external field that "follows" the field applied so it would likely move sideways, that is why to "levitate in place" a diamagnet people normally use a Halbach array.
EDIT: A Halback array is made alternating the poles N-S of the magnet, so that forces of repulsion created by the diamagnet cancel. This is why you will see people using multiple magnets when levitating pyrolytic graphite.