Competition between Mott transition and superconductivity under magnetic fields in strongly correlated organic superconductor κ-(BEDT-TTF) 2Cu[N(CN)2]Br

T. Sasaki, N. Yoneyama, N. Kobayashi

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Abstract

The phase diagram under magnetic fields in the organic Mott system κ-(BEDT-TTF)2Cu[N(CN)2]Br in which the bandwidth was tuned by the substitution of deuterated molecules was studied by means of the resistivity measurements. The lower critical point of the first-order Mott transition, which ended on the upper critical field H c2-temperature plane of the superconductivity, was found in addition to the previously observed upper critical end point. The lower critical end point moved to a lower temperature together with the suppression of T c in magnetic fields and then it reached T 0 when H > H C2 in the end.

Original languageEnglish
Article number052225
JournalJournal of Physics: Conference Series
Volume150
Issue number5
DOIs
Publication statusPublished - 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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