Phase Diagram of ${\beta }^{\prime }$-(BEDT-TTF)${}_2$ICl${}_2$ under High Pressure Based on the First-Principles Electronic Structure

Abstract

We present a theoretical study on the superconductivity of ${\beta }^{\prime }$-(BEDT-TTF)${}_2$ICl${}_2$ at $T_{\mathrm{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.

arXiv comment4 pages, 3 figures. accepted for publication in J. Phys. Soc. Jpn. errors corrected

References in corpus (5)

• Pairing due to Spin Fluctuations in Layered Organic Superconductors
• Phase Diagram of Superconductivity on the Anisotropic Triangular Lattice Hubbard Model
• Spin Fluctuation-Induced Superconductivity in Organic Compounds
• Effects of Spin Fluctuations in Quasi-One-Dimensional Organic Superconductors
• Origin of the Superconductivity in β'-(BEDT-TTF)_2ICl_2 under High Pressure and β-(BEDT-TTF)_2X at Ambient Pressure

Cited by in corpus (7)

• Anomalous Transport Phenomena in Fermi Liquids with Strong Magnetic Fluctuations
• Pairing Symmetry Competition in Organic Superconductors
• Emergence of charge degrees of freedom under high pressure in an organic dimer-Mott insulator ${\beta }^{\prime }$-(BEDT-TTF)${}_2$ICl${}_2$
• First-principles study of hydrogen-bonded molecular conductor $\kappa$-H${}_3$(Cat-EDT-TTF/ST)${}_2$
• Two-band Fluctuation Exchange Study on the Superconductivity of ${\beta }^{\prime }$-(BEDT-TTF)${}_2$ICl${}_2$ under High Pressure
• Pressure-induced topological changes in Fermi surface of two-dimensional molecular conductor
• Stability of correlated insulating states in molecular conductors from first-principles calculation