Last month, Chinese researchers published a pre-print article where they found Possible Meissner effect near room temperature in copper-substituted lead apatite. This was an Lk99 variant with sulfur in the chemistry. They detected evidence of possible Meissner effect magnetic fields which would be consistent with room temperature superconductivity.
The lead researcher, Yao Yao, is sending out messages that more experimental evidence consistent with room temperature superconductivity is being found. It is still not conclusive and has not been published.
Professor Yao Yao said that the LK99-like samples from the research group at Central South University reached the milliohm level in the multimeter resistance test! pic.twitter.com/ugleifGHJl
Professor Yao Yao said that he was forced to change the raw material because of the lack of cuprous phosphide, and unexpectedly achieved very good results. pic.twitter.com/hoKPwTntvZ
Prof Yao Yao said the conductivity of the samples in the latest full levitation video is too good and the microwave absorption is super strong, which is similar to YBCO superconductors, and the resistance detection takes a while. pic.twitter.com/o3q4McKeOQ