Pb_10-xCu_x(PO₄)₆O: a Mott or charge transfer insulator in need of further doping for (super)conductivity

2023/08/08 by Liang Si, Si, Liang, Markus Wallerberger +9 · 2 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Crystal Structures and Properties #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con)

paper · pdf · doi:10.48550/arxiv.2308.04427

openalex publication_date 2023/08/08 · openalex created_date 2023/08/10 · openalex updated_date 2026/07/28

Abstract

We briefly review the status quo of research on the putative superconductor Pb₉Cu(PO₄)₆O also known as LK-99. Further, we provide \em ab initio derived tight-binding parameters for a two- and five-band model, and solve these in dynamical-mean-field theory. The ratio interaction-to-bandwidth makes LK-99 a Mott or charge transfer insulator. Electron or hole doping (which is different from substituting Pb by Cu and thus differs from LK-99) is required to make it metallic and potentially superconducting.

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