Pressure-Induced Mott Transition in an Organic Superconductor with a Finite Doping Level

H. Oike; K. Miyagawa; H. Taniguchi; K. Kanoda

doi:10.1103/PhysRevLett.114.067002

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Pressure-Induced Mott Transition in an Organic Superconductor with a Finite Doping Level

H. Oike, K. Miyagawa, H. Taniguchi, K. Kanoda

DOI 10.1103/PhysRevLett.114.067002 · Physical Review Letters

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Abstract

We report the pressure study of a doped organic superconductor with a Hall coefficient and conductivity measurements. We find that maximally enhanced superconductivity and a marginal-Fermi liquid appear around a certain pressure where mobile carriers increase critically, suggesting a possible quantum phase transition between strongly and weakly correlated regimes. This observation points to the presence of a criticality in Mottness for a doped Mott insulator with tunable correlation.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
κ-(ET)4Hg2.89Br8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure unresolved	unknown
κ-(ET)4Hg2.89Br8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	0.2 GPa	unknown
κ-(ET)4Hg2.89Br8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	0.4 GPa	unknown
κ-(ET)4Hg2.89Br8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	0.5 GPa	unknown