sollee (e/acc)

@[email protected]
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83 Posts

the mastodon branch of the e/acc movement

tokiponist / ethereum enthusiast / dev / voluntarist / e/acc

"Do something hard. Do it for everyone who comes next. That’s it. Existence will take care of the rest. Just build."

Follow me to get posts related to cryptocurrency, Ethereum, anarcho-capitalism, and sometimes just some random rants.

#tech #foss #crypto #web3 #defi #tokipona #fedi22

pronounshe/him/ona/li
politicsvoluntarist/anarcho-capitalist + e/acc
the solleesitehttps://sollee.eth.limo
sollee (e/acc)Aug 4, 2023

"All we know is that we must expand, expand, expand, as fast and as far as we can."

HARVEST

e/acc
#ai #art #artwork #aiart #scifi

sollee (e/acc)Aug 4, 2023

#LK99 Meissner effect replicated by Huazhong University

https://arxiv.org/abs/2308.01516

#physics #science #chemistry

Successful growth and room temperature ambient-pressure magnetic levitation of LK-99

Recently, Sukbae Lee et al. reported inspiring experimental findings on the atmospheric superconductivity of a modified lead apatite crystal (LK-99) at room temperature (10.6111/JKCGCT.2023.33.2.061, arXiv: 2307.12008, arXiv: 2307.12037). They claimed that the synthesized LK-99 materials exhibit the Meissner levitation phenomenon of superconductors and have a superconducting transition temperature (Tc) higher than 400 K. Here, for the first time, we successfully verify and synthesize the LK-99 crystals which can be magnetically levitated with larger levitated angle than Sukbae Lee's sample at room temperature. It is expected to realize the true potential of room temperature, non-contact superconducting magnetic levitation in near future.

arXiv.org
sollee (e/acc)Aug 4, 2023
fuck doomerism, let's *accelerate*
sollee (e/acc)Aug 4, 2023

Andrew McCalip has successfully replicated a small diamagnetic sample of #LK99

https://twitter.com/andrewmccalip/status/1687405505604734978

#physics #science #chemistry

Andrew McCalip on Twitter

“Meissner effect or bust: Day 8.5 We made the rocks”

Twitter
sollee (e/acc)Aug 4, 2023

More theoretical insight by Universidad de Chile on #LK99

https://arxiv.org/abs/2308.01135

#physics #science #chemistry

Electronic Structure and Vibrational Stability of Copper-substituted Lead Apatite (LK-99)

Two recent preprints in the physics archive (arXiv) have called attention as they claim experimental evidence that a Cu-substituted apatite material (dubbed LK-99) exhibits superconductivity at room temperature and pressure. If this proves to be true, LK-99 will be a ``holy grail" of superconductors. In this work, we used Density Functional Theory (DFT+U) calculations to elucidate some key features of the electronic structure of LK-99. We find two different phases of this material: (i) a hexagonal lattice featuring metallic half-filled and spin-split bands, a nesting of the Fermi surface, a remarkably large electron-phonon coupling, but this lattice is vibrationally unstable. (ii) a triclinic lattice, with the Cu and surrounding O distorted. This lattice is vibrationally stable and its bands correspond to an insulator. In a crystal, the Cu atoms should oscillate between equivalent triclinic positions, with an average close to the hexagonal positions. We discuss the electronic structure expected from these fluctuations and if it is compatible with superconductivity.

arXiv.org
sollee (e/acc)Aug 4, 2023

Video released by original #LK99 author of a floating chunk of LK-99

(birdsite, sorry)
https://twitter.com/floates0x/status/1687190672280096768

#physics #science #chemistry

Floates0x on Twitter

“NEW: Hyun-Tak Kim (writer of the 6 author LK-99 Superconductor paper) has provided the New York Times with a new video showing the levitating LK-99 sample.”

Twitter
sollee (e/acc)Aug 4, 2023

New theoretical explanation of #LK99 by University of California, Irvine & University of Toronto

https://arxiv.org/abs/2308.01315

#physics #science #chemistry

Minimal model for the flat bands in copper-substituted lead phosphate apatite: Strong diamagnetism from multi-orbital physics

The claims that a copper-substituted lead apatite, denoted as CuPb$_9$(PO$_4$)$_6$OH$_2$, could be a room-temperature superconductor have led to an intense research activity. While other research groups did not confirm these claims, and the hope of realizing superconductivity in this compound has all but vanished, other findings have emerged which motivate further work on this material. In fact, Density Functional Theory (DFT) calculations indicate the presence of two nearly flat bands near the Fermi level, which are known to host strongly correlated physics. In order to facilitate the theoretical study of the intriguing physics associated with these two flat bands, we propose a minimal tight-binding model which reproduces their main features. We then calculate the orbital magnetic susceptibility of our two-band model and find a large diamagnetic response which arises due to the multi-orbital nature of the bands and which could provide an explanation for the strong diamagnetism reported in experiments.

arXiv.org
sollee (e/acc)Aug 3, 2023

Department of Condensed Matter Physics announces they will try to replicate #LK99

https://twitter.com/CondMatfyz/status/1687007611806195712

#physics #science #chemistry

Department of Condensed Matter Physics || MFF UK on Twitter

“1/4 🧵 Our crystal growth team is thrilled to be part of the quest for room-temperature superconductivity (RT-SC)! Today, we initiated the synthesis process for LK-99 🧪 the possible material with a critical temperature above the boiling point of water. #LK99 @matfyz 👇 thread”

Twitter
sollee (e/acc)Aug 3, 2023

New theory suggests Cu0 is what makes #LK99 a room temp superconductor

https://arxiv.org/abs/2308.01307

(Excuse me for the delayed news, I had to sleep so I wasn't able to track LK-99 during that time)

#physics #chemistry #science

Broad Band Mott Localization is all you need for Hot Superconductivity: Atom Mott Insulator Theory for Cu-Pb Apatite

A hypothetical non-dimerized Cu chain in equilibrium is a spin-\half atom Mott insulator (AMI), eventhough its band width is high ~ 10 eV. This RVB reservoir has a large exchange coupling J ~ 2 eV. This idea of, \textit{broad band Mott localization} was used by us in our earlier works, including prediction of high Tc superconductivity in doped graphene, silicene and a theory for hot superconductivity reported in Ag-Au nanostructures (TP 2008). In the present work we identify possible random AMI subsystems in Cu-Pb Apatite and develop a model for reported hot superconductivity (LKK 2023). In apatite structure, network of interstitial columnar spaces run parallel to c-axis and ab-plane. They accomodate excess copper, as neutral Cu atom clusters, chains and planar segments. They are our emergent AMI's. Electron transfer from AMI's to insulating host, generates strong local superconducting correlation, via phyics of doped Mott insulator. Josephson coupling between doped AMI's, establishes hot superconductivity. A major Challenge to superconducting order in real material is competing insulating phases - valence bond solid (spin-Peirels)-lattice distortions etc. AMI theory points to ways of making the \textit{elusive superconductivity} palpable. We recommend exploration of hot superconductivity in the rich world of minerals and insulators, via metal atom inclusion.

arXiv.org
sollee (e/acc)Aug 2, 2023

Chinese Southeast University finds superconductivity of #LK99
below 110 K (-163.15 C)

https://targum.video/v/2023/8/2/79065d85347d0a5dececb858f7e3acbd/

#physics #science #chemistry

Latest research findings on LK99 and the existence of extraterrestrial super islands

Sun Yuyue from the Physics Department of Southeast University reports on the team's latest research on LK99. They have observed zero resistance below 110K, which could be crucial evidence for the existence of super island electronics. The research paper will be published soon.

Targum Video