Abrupt Emergence of Pressure-Induced Superconductivity of 34 K in SrFe2As2: A Resistivity Study under Pressure
Abstract
We report resistivity measurement under pressure in single crystals of SrFe2As2, which is one of the parent materials of Fe-based superconductors. The structural and antiferromagnetic (AFM) transition of T0 = 198 K at ambient pressure is suppressed under pressure, and the ordered phase disappears above Pc ~ 3.6-3.7 GPa. Superconductivity with a sharp transition appears accompanied by the suppression of the AFM state. Tc exhibits a maximum of 34.1 K, which is realized close to the phase boundary at Pc. This Tc is the highest among those of the stoichiometric Fe-based superconductors.
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