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      Phase Diagram of \(\beta'\)-(BEDT-TTF)\(_2\)ICl\(_2\) under High Pressure Based on the First-Principles Electronic Structure

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          Abstract

          We present a theoretical study on the superconductivity of \(\beta'\)-(BEDT-TTF)\(_2\)ICl\(_2\) at \(T_{\rm c}=\)14.2 K under a high hydrostatic pressure recently found, which is the highest among organic superconductors. In the present work, we study an effective model using the fluctuation-exchange (FLEX) approximation based on the results of first-principles calculation. In the obtained phase diagram, the superconductivity with \(d_{xy}\)-like symmetry is realized next to the antiferromagnetic phase, as a result of the one-dimensional to two-dimensional crossover driven by the pressure.

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          Author and article information

          Journal
          19 November 2003
          2003-11-20
          Article
          10.1143/JPSJ.73.25
          cond-mat/0311436
          Custom metadata
          4 pages, 3 figures. accepted for publication in J. Phys. Soc. Jpn. errors corrected
          cond-mat.supr-con cond-mat.str-el

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