SrFeAsF as a parent compound for iron pnictide superconductors

Abstract

We have successfully synthesized the fluo-arsenide SrFeAsF, a new parent phase with the ZrCuAsSi structure. The temperature dependence of resistivity and dc magnetization both reveal an anomaly at about T_{an} = 173 K, which may correspond to the structural and/or Spin-Density-Wave (SDW) transition. Strong Hall effect and magnetoresistance were observed below T_{an}. Interestingly, the Hall coefficient R_H is positive below T_{an}, which is opposite to the cases in the two parent phases of FeAs-based systems known so far, i.e., LnFeAsO (Ln = rare earth elements) and (Ba, Sr)Fe_2As_2 where the Hall coefficient R_H is negative. This strongly suggests that the gapping to the Fermi surfaces induced by the SDW order is more complex than we believed before that it removes the density of states on some Fermi pockets and leaves one of the electron pockets less-gapped or un-gapped. Our data clearly show that it is possible for the parent phase to have electron-like or hole-like charge carriers.

4 pages, 4 figures, to be published in Phys. Rev. B as a Rapid Communication

References in corpus (16)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
• Superconductivity at 43 K in Samarium-arsenide Oxides $SmFeAs{O}_{1-x}{F}_x$
• Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO${}_{1-x}$F${}_x$FeAs
• Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
• Superconductivity up to 37 K in (A1-xSrx)Fe2As2 with A=K and Cs
• LiFeAs: An Intrinsic FeAs-based Superconductor with Tc = 18K
• Competing Orders and Spin-Density-Wave Instability in La(O${}_{1-x}$F${}_x$)FeAs
• Thorium-doping induced superconductivity up to 56 K in Gd1-xThxFeAsO
• Superconductivity at 25 K in hole doped $(L{a}_{1-x}S{r}_x)OFeAs$
• Superconductivity at 52 K in iron-based F-doped layered quaternary compound Pr[O1-xFx]FeAs
• Hall effect and magnetoresistance in the normal state of the superconductor LaO${}_{0.9}$F${}_{0.1-x}$FeAs
• Upper critical field, Hall effect and magnetoresistance in the iron-based layered superconductor LaFeAsO_{0.9}F_{0.1-δ}
• Superconductivity at 36 K in Gadolinium-arsenide Oxides GdO${}_{1-x}$F${}_x$FeAs
• Hall effect and magnetoresistance in single crystals of NdFeAsO${}_{1-x}$F${}_x$
• Fully Band Resolved Scattering Rate in MgB2 Revealed by Nonlinear Hall Effect and Magnetoresistance Measurements

Cited by in corpus (35)

• The Puzzle of High Temperature Superconductivity in Layered Iron Pnictides and Chalcogenides
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• High-T_c superconductivity induced by doping rare earth elements into CaFeAsF
• New layered fluorosulfide SrFBiS2
• Superconductivity in Fluorine-Arsenide Sr_{1-x}La_xFeAsF
• Magnetic order in CaFe1-xCoxAsF (x = 0, 0.06, 0.12) superconductor compounds
• Multi-band superconductivity and large anisotropy in FeS crystals
• Effect of 3d Transition Metal Doping on the Superconductivity in Quaternary Fluoroarsenide CaFeAsF
• Neutron spin resonance in a quasi-two-dimensional iron-based superconductor
• Short- and long-range magnetic order in LaMnAsO
• Synthesis and physical properties of $\mathbf{La}{\mathbf{O}}_{1-\mathbf{x}}{\mathbf{F}}_{\mathbf{x}}\mathbf{FeAs}$
• Anion height dependence of Tc and density of states in iron based superconductors
• Electronic Structure, Transport and Phonons of SrAg$Ch$F ($Ch$=S, Se, Te): Bulk Superlattice Thermoelectrics
• Iron Based Superconductors: Pnictides versus Chalcogenides
• Superconductivity induced by hydrogen anion substitution in 1111-type iron arsenides
• Structural properties and superconductivity of SrFe2As2-xPx and CaFe2As2-yPy
• Spin-phonon coupling and pressure effect in the superconductor LiFeAs : Lattice dynamics from first-principles calculations
• Structure and physical properties of new layered iron oxychalcogenide BaFe2OSe2
• BaFe2Se2O as an Iron-Based Mott Insulator with Antiferromagnetic Order
• Fermi surface with Dirac fermions in CaFeAsF determined via quantum oscillation measurements
• Neutron diffraction study on phase transition and thermal expansion of SrFeAsF
• Discovery of a novel 112-type iron-pnictide and La-doping induced superconductivity in Eu1-xLaxFeAs2 (x = 0 ~ 0.15)
• Two-dimensional magnetism in the pnictide superconductor parent material SrFeAsF probed by muon-spin relaxation
• Chemical doping and high pressure studies of layered beta-PdBi2 single crystals
• Structural and transport properties of Sr2VO{3-delta}FeAs superconductors with different oxygen deficiencies
• Charge redistribution at the antiferromagnetic phase transition in SrFeAsF compound
• Growth and characterization of CaFe${}_{1-x}$Co${}_x$AsF single crystals by CaAs flux method
• Striped antiferromagnetism and electronic structures of SrFeAsF and their implications
• Upper critical field, critical current density and thermally activated flux flow in CaFFe0.9Co0.1As superconductor
• Effects of Pressure on the Electronic and Structural Properties of LaOFeAs
• Superconductivity in Ti-doped Iron-Arsenide Compound Sr4Cr0.8Ti1.2O6Fe2As2
• A Mössbauer study of the magneto-structural coupling effect in SrFe${}_2$As${}_2$ and SrFeAsF
• Band structure of tetragonal and orthorhombic fluorine-arsenide SrFeAsF as a parent phases for a new group of oxygen-free FeAs superconductors
• Superconductivity above 30 K due to the introduction of oxygen in CaFeAsF