Superconducting and normal phases of FeSe single crystals at high pressure

Abstract

We report on the synthesis of superconducting single crystals of FeSe, and their characterization by X-ray diffraction, magnetization and resistivity. We have performed ac susceptibility measurements under high pressure in a hydrostatic liquid argon medium up to 14 GPa and we find that TC increases up to 33-36 K in all samples, but with slightly different pressure dependences on different samples. Above 12 GPa no traces of superconductivity are found in any sample. We have also performed a room temperature high pressure X-ray diffraction study up to 12 GPa on a powder sample, and we find that between 8.5 GPa and 12 GPa, the tetragonal PbO structure undergoes a structural transition to a hexagonal structure. This transition results in a volume decrease of about 16%, and is accompanied by the appearance of an intermediate, probably orthorhombic phase.

References in corpus (8)

• Superconductivity at 27 K in tetragonal FeSe under high pressure
• Extreme Sensitivity of Superconductivity to Stoichiometry in FeSe (Fe1+dSe)
• Thorium-doping induced superconductivity up to 56 K in Gd1-xThxFeAsO
• Superconductivity up to 29 K in SrFe2As2 and BaFe2As2 at high pressures
• Abrupt Emergence of Pressure-Induced Superconductivity of 34 K in SrFe2As2: A Resistivity Study under Pressure
• Growth and Superconductivity of FeSex Crystals
• Pressure-Induced Effects on the Structure of the FeSe Superconductor
• Crystal growth and superconductivity of FeSe_x

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• Superconductivity in SnO: a Nonmagnetic Analog to Fe-based Superconductors?
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