Pb${}_{10-x}$Cu${}_x$(PO${}_4$)${}_6$O: a Mott or charge transfer insulator in need of further doping for (super)conductivity

Liang Si, Markus Wallerberger, Andriy Smolyanyuk +3

We briefly review the status quo of research on the putative superconductor Pb${}_9$Cu(PO${}_4$)${}_6$O also known as LK-99. Further, we provide {\em ab initio} derived tight-binding par…