S-wave pairing in a two-orbital t-J model on triangular lattice: possible application to Pb${}_{10-x}$Cu${}_x$(PO${}_4$)${}_6$O

Hanbit Oh, Ya-Hui Zhang

Recently room temperature superconductor was claimed in Pb${}_{10-x}$Cu${}_x$(PO${}_4$)${}_6$O (also known as LK-99) with $x\in (0.9,1.1)$. Density functional theory (DFT) calculations sug…