Synthesis, crystal structure and magnetism of beta-Fe1.00(2)Se1.00(3) single crystals

Abstract

Understanding iron based superconductors requires high quality impurity free single crystals. So far they have been elusive for beta-FeSe and extraction of intrinsic materials properties has been compromised by several magnetic impurity phases. Herein we report synchrotron - clean beta-FeSe superconducting single crystals grown via LiCl/CsCl flux method. Phase purity yields evidence for a defect induced weak ferromagnetism that coexists with superconductivity below Tc. In contrast to Fe1+yTe - based superconductors, our results reveal that the interstitial Fe(2) site is not occupied and that all contribution to density of states at the Fermi level must come from in-plane Fe(1).

arXiv comment8 pages, 11 figures

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• Structural Analysis and Superconducting Properties of F-Substituted NdOBiS2 Single Crystals
• Critical current density, vortex dynamics, and phase diagram of FeSe single crystal
• Critical fields, thermally-activated transport and critical current density of beta-FeSe single crystals
• Enhancement of the Superconducting Transition Temperature in FeSe Epitaxial Thin Films by Anisotropic Compression
• Enhanced Superconductivity on the Tetragonal Lattice in FeSe under Hydrostatic Pressure
• Multiband effects on beta-FeSe single crystals
• Interplay between lattice and spin states degree of freedom in the FeSe superconductor: dynamic spin state instabilities
• Synthesis and Crystal Growth of Tetragonal Fe1.00Se
• Room temperature local nematicity in FeSe superconductor
• Flux-free growth of large superconducting crystal of FeSe by traveling-solvent floating-zone technique
• Growth, Characterization, Vortex Pinning and Vortex Flow Properties of Single Crystals of Iron Chalcogenide Superconductor FeCr${}_{0.02}$Se
• Transport and pinning properties of Ag-doped FeSe0.94
• Robustness of superconductivity to competing magnetic phases in tetragonal FeS
• Photoinduced ultrafast dynamics of local nematicity and lattice distortions in FeSe crystals
• Magnetic phase separation and superfluid density measurements in alkali metal-organic solvent intercalated iron selenide superconductor Lix(C5H5N)yFe2-zSe2
• In-plane optical spectroscopy study on FeSe epitaxial thin film grown on SrTiO${}_3$ substrate
• Superconducting properties of novel BiSe${}_2$-based layered LaO${}_{1-x}$F${}_x$BiSe${}_2$ single crystals
• Synthesis, phase stability, structural and physical properties of 11-type iron chalcogenides
• Band structure reconstruction across nematic order in high quality FeSe single crystal as revealed by optical spectroscopy study
• Growth and characterization of R(O,F)BiS2 (R = La, Ce, Pr, Nd) superconducting single crystals
• Magnetic neutron scattering studies on the Fe-based superconductor system Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$
• The Superconducting Transition Temperatures of Fe1+xSe1--y, Fe1+xSe1--yTey and (K/Rb/Cs)zFe2--xSe2
• Suppression of Superconductivity and Nematic Order in Fe${}_{1-y}$Se${}_{1-x}$S${}_x$ (0$\le$$x$$\le$1, $y$$\le$0.1) Crystals by Anion Height Disorder
• Piezomagnetism of FeSe single crystals
• Substitution of Ni for Fe in superconducting Fe${}_{0.98}$Te${}_{0.5}$Se${}_{0.5}$ depresses the normal-state conductivity but not the magnetic spectral weight
• Growth of (NaxKy)FezSe2 crystals by chlorides flux at low temperatures