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Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2(arxiv.org)
444 points by lnyan | 268 comments
arXiv preprint (v2) by Lee et al. claiming LK-99, a copper-doped lead apatite, is a room-temperature ambient-pressure superconductor showing levitation.
Semiconducting Transport in LK99 reproduction attempt(arxiv.org)
576 points by spekcular | 240 comments
arXiv preprint reporting a synthesis of the LK-99 compound Pb10-xCux(PO4)6O that shows semiconducting rather than superconducting transport.
Successful room temperature ambient-pressure magnetic levitation of LK-99(arxiv.org)
2308 points by spekcular | 1146 comments
arXiv preprint reporting synthesis of LK-99 crystals that show room-temperature, ambient-pressure magnetic levitation, replicating Sukbae Lee et al.'s claims.
Possible Meissner effect near room temperature: copper-substituted lead apatite(arxiv.org)
687 points by zaikunzhang | 287 comments
arXiv preprint reporting possible Meissner effect near room temperature in copper-substituted lead apatite (LK-99-type material), based on magnetization measurements.
Related stories
Successful room temperature ambient-pressure magnetic levitation of LK-99(arxiv.org)
2308 points by spekcular | 1146 comments
arXiv preprint reporting synthesis of LK-99 crystals that show room-temperature, ambient-pressure magnetic levitation, replicating Sukbae Lee et al.'s claims.
Semiconducting Transport in LK99 reproduction attempt(arxiv.org)
576 points by spekcular | 240 comments
arXiv preprint reporting a synthesis of the LK-99 compound Pb10-xCux(PO4)6O that shows semiconducting rather than superconducting transport.
LK-99 isn’t a superconductor(nature.com)
2063 points by Brajeshwar | 679 comments
Nature news article from August 2023 explaining how researchers determined that LK-99 is not a room-temperature superconductor.
Electronic Structure of LK-99(arxiv.org)
497 points by spekcular | 373 comments
arXiv preprint presenting DFT calculations of the electronic structure of the putative room-temperature superconductor LK-99 (Pb9Cu(PO4)6O), finding flat Cu bands at the Fermi level.
RWKV: Reinventing RNNs for the Transformer Era(arxiv.org)
318 points by ianbutler | 164 comments
arXiv paper introducing RWKV, a model architecture combining Transformer-style parallel training with efficient RNN inference via linear attention.
LLMs are making formal software verification feasible at a much larger scale(anthropic.com)
429 points by johnbender | 265 comments
Anthropic research post describing how Claude produced formal proofs of crash-freedom for RISC-V binaries of 123 OSS-Fuzz open-source libraries, finding bugs along the way.