Crystal structure of the new FeSe1-x superconductor

Abstract

The newly discovered superconductor FeSe1-x (x=0.08, Tconset=13.5 K at ambient pressure rising to 27 K at 1.48 GPa) exhibits a structural phase transition from tetragonal to orthorhombic below 70 K at ambient pressure - the crystal structure in the superconducting state shows remarkable similarities to that of the REFeAsO1-xFx (RE = rare earth) superconductors

Chem. Commun. (2008)

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• High temperature superconductivity (Tc onset at 34K) in the high pressure orthorhombic phase of FeSe
• Strong $(\pi ,0)$ spin fluctuations in $\beta$-FeSe observed by neutron spectroscopy
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• Physics and chemistry review of layered chalcogenide superconductors
• Critical fields, thermally-activated transport and critical current density of beta-FeSe single crystals
• Pressure-Induced Effects on the Structure of the FeSe Superconductor
• Electric Transport of a Single Crystal Iron Chalcogenide FeSe Superconductor: Evidence of Symmetry Breakdown Nematicity and Additional Ultrafast Dirac cone-Like Carriers
• Metal - Insulator transition in Fe1.01-xCuxSe
• Cation vacancy order in the K0.8+xFe1.6-ySe2 system: five-fold cell expansion accommodates 20% tetrahedral vacancies
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• Synthesis, crystal structure and magnetism of beta-Fe1.00(2)Se1.00(3) single crystals
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• Low-temperature nuclear and magnetic structures of La2O2Se2.Fe2O from X-ray and neutron diffraction measurements
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• Theory of optical responses in clean multi-band superconductors
• Electronic Structure of Superconducting FeSe Studied by High-Resolution Photoemission Spectroscopy
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• Quantitative characterization of short-range orthorhombic fluctuations in FeSe through pair distribution function analysis
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• Anisotropic effect of a magnetic field on the neutron spin resonance in FeSe
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• The role of correlations in the high-pressure phase of FeSe
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• Generic deformation channels for critical Fermi surfaces in the collisionless regime
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• Evidence of superconductivity-induced phonon spectra renormalization in alkali-doped iron selenides
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