We briefly review the status quo of research on the putative superconductor Pb9Cu(PO4)6O also known as LK-99. Further, we provide ab initio derived tight-binding parameters for a two- and five-band model, and solve these in dynamical-mean-field theory. The interaction-to-bandwidth ratio 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.
Pb10−x Cu x (PO4)6O: a Mott or charge transfer insulator in need of further doping for (super)conductivity / Si, Liang; Wallerberger, Markus; Smolyanyuk, Andriy; DI CATALDO, Simone; M Tomczak, Jan; Held, Karsten. - In: JOURNAL OF PHYSICS. CONDENSED MATTER. - ISSN 0953-8984. - 36:6(2023). [10.1088/1361-648X/ad0673]
Pb10−x Cu x (PO4)6O: a Mott or charge transfer insulator in need of further doping for (super)conductivity
Simone di CataldoInvestigation
;
2023
Abstract
We briefly review the status quo of research on the putative superconductor Pb9Cu(PO4)6O also known as LK-99. Further, we provide ab initio derived tight-binding parameters for a two- and five-band model, and solve these in dynamical-mean-field theory. The interaction-to-bandwidth ratio 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.| File | Dimensione | Formato | |
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Si_Pb10−x _2024.pdf
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1.96 MB | Adobe PDF |
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