So I woke up this morning to find an e-mail from David Singh that makes iron
pnictides compounds even more interesting. Apparently, last year, Hsu et al. replaced arsenic with selenium and found that their new compound could superconduct at 8K. Now Singh tells me that other groups are reporting temperatures of up to 37K at high pressures for some FeSe compounds (there’s plenty more on arXiv, so don’t take that link as a conclusive lit search). Se compounds are chalcogenides, so he thinks they can’t rightly be called iron pnictides anymore.
Iron-based superconductors is a little bland. Anybody got a better name?