We report the pressure study of a doped organic superconductor with Hall coefficient and conductivity measurements. We find that maximally enhanced superconductivity and a non-Fermi liquid appear around a certain pressure where mobile carriers increase critically, suggesting a possible quantum phase transition between strongly and weakly correlated regimes. Our description extends the conventional picture of a Mott metal-insulator transition at half filling to the case of a doped Mott insulator with tunable correlation.
@article{arxiv.1409.4965,
title = {Mottness in a doped organic superconductor},
author = {H. Oike and K. Miyagawa and H. Taniguchi and K. Kanoda},
journal= {arXiv preprint arXiv:1409.4965},
year = {2025}
}