Pressure-induced Mott transition in an organic superconductor with a finite doping level.

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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.

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Journal

Journal ID (iso-abbrev): Phys. Rev. Lett.

Title: Physical review letters

Publisher: American Physical Society (APS)

ISSN (Electronic): 1079-7114

ISSN (Print): 0031-9007

Publication date (Electronic): Feb 13 2015

Volume: 114

Issue: 6

Affiliations

[1 ] Department of Applied Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0032, Japan.

[2 ] Department of Physics, Saitama University, Saitama, Saitama 338-8570, Japan.

Article

DOI: 10.1103/PhysRevLett.114.067002

PubMed ID: 25723239

SO-VID: c0029159-78d3-4769-939f-8befab336697

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