Carrier density crossover and quasiparticle mass enhancement in a doped 5<i>d</i> Mott insulator

Nature Physics, Published online: 02 August 2024; doi:10.1038/s41567-024-02564-3

The pseudogap in cuprates is often linked to superconductivity. Now bulk evidence for a pseudogap is found in doped non-superconducting Sr2IrO4, revealing that pseudogaps in doped Mott insulators are not necessarily a precursor to superconductivity.