The 4th International Conference on Matter and Radiation at Extremes (ICMRE 2019)

350 / 2019-02-27 12:02:09

Pressure effects on iron-based superconductor CaFe0.88Co0.12AsF

iron-based superconductors, pressure, phase diagram

Plenary track > High Pressure Physics and Materials Science

Systematic measurements of electrical resistivity and Hall coefficient under high pressure were performed on CaFe0.88Co0.12AsF single crystal samples. The superconductivity is suppressed quickly by pressure and can not be detected down to 2 K at above 12.7 GPa, while the magnitude of the Hall coefficient RH shows a very weak pressure and temperature dependence. A comprehensive analysis considering the pressure dependence of Tc, RH, residual resistivity ratio, and the Fermi-liquid term of the resistivity indicates that the electron correlation is an important factor in superconductivity of iron-based superconductors.