Transport and anisotropy in single-crystalline SrFe${}_2$As${}_2$ and $A_{0.6}$K${}_{0.4}$Fe${}_2$As${}_2$ ($A$ = Sr, Ba) superconductors

Abstract

We have successfully grown high quality single crystals of SrFe${}_2$As${}_2$ and A${}_{0.6}$K${}_{0.4}$Fe${}_2$As${}_2$(A=Sr, Ba) using flux method. The resistivity, specific heat and Hall coefficient have been measured. For parent compound SrFe${}_2$As${}_2$, an anisotropic resistivity with ${\rho }_c$ / ${\rho }_{ab}$ as large as 130 is obtained at low temperatures. A sharp drop in both in-plane and out-plane resistivity due to the SDW instability is observed below 200 K. The angular dependence of in-plane magnetoresistance shows 2-fold symmetry with field rotating within ab plane below SDW transition temperature. This is consistent with a stripe-type spin ordering in SDW state. In K doped A${}_{0.6}$K${}_{0.4}$Fe${}_2$As${}_2$(A=Sr. Ba), the SDW instability is suppressed and the superconductivity appears with T${}_c$ above 35 K. The rather low anisotropy in upper critical field between H$\parallel$ab and H$\parallel$c indicates inter-plane coupling play an important role in hole doped Fe-based superconductors.

12 pages, 6 figures. Accepted by Phys. Rev. B

References in corpus (24)

• 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
• Competing Orders and Spin-Density-Wave Instability in La(O${}_{1-x}$F${}_x$)FeAs
• Superconductivity in iron-based F-doped layered quaternary compound Nd[O1-xFx]FeAs
• Thorium-doping induced superconductivity up to 56 K in Gd1-xThxFeAsO
• Anisotropic thermodynamic and transport properties of single crystalline (Ba${}_{1-x}$K${}_x$)Fe${}_2$As${}_2$ (x = 0 and 0.45)
• Phase transitions in LaFeAsO: structural, magnetic, elastic, and transport properties, heat capacity and Mossbauer spectra
• First order structural phase transition in CaFe${}_2$As${}_2$
• Evolution from Itinerant Antiferromagnet to Unconventional Superconductor with Fluorine Doping in La(O_{1-x}F_{x})FeAs Revealed by ^{75}As and ^{139}La Nuclear Magnetic Resonance
• Commensurate Spin Density Wave in LaOFeAs: A Local Probe Study
• Structural and magnetic phase transitions in the ternary iron arsenides SrFe2As2 and EuFe2As2
• Spin and Lattice Structure of Single Crystal SrFe2As2
• Different resistivity response to spin density wave and superconductivity at 20 K in $C{a}_{1-x}N{a}_{x}F{e}_{2}A{s}_2$
• Critical Fields and Anisotropy of NdO0.82F0.18FeAs Single Crystals
• Structural transition and anisotropic properties of single crystalline SrFe2As2
• Superconducting properties of Fe-based layered superconductor LaO${}_{0.9}$F${}_{0.1-\delta }$FeAs
• Spin Ordering in LaOFeAs and Its Suppression in Superconductor LaO0.89F0.11FeAs Probed by Mössbauer Spectroscopy
• Specific heat of the iron-based high-$T_c$ superconductor SmO${}_{1-x}$F${}_x$FeAs
• Transport properties and superconductivity in $B{a}_{1-x}{M}_{x}F{e}_{2}A{s}_2$ (M=La and K) with double FeAs layers
• Hysteresis and Anisotropic Magnetoresistance in Antiferromagnetic $N{d}_{2-x}C{e}_{x}Cu{O}_4$

Cited by in corpus (36)

• Nearly Isotropic superconductivity in (Ba,K)Fe2As2
• Exploration of new superconductors and functional materials and fabrication of superconducting tapes and wires of iron pnictides
• Origin of the spin density wave instability in AFe${}_2$As${}_2$ (A=Ba, Sr) as revealed by optical spectroscopy
• Superconducting gap symmetry of Ba0.6K0.4Fe2As2 studied by angle-resolved photoemission spectroscopy
• Anisotropy of the Optimally-Doped Iron Pnictide Superconductor Ba(Fe0.926Co0.074)2As2
• Structural transition and anisotropic properties of single crystalline SrFe2As2
• Possible re-entrant superconductivity in EuFe2As2 under pressure
• Superconductivity coexisting with phase-separated static magnetic order in (Ba,K)Fe${}_2$As${}_2$, (Sr,Na)Fe${}_2$As${}_2$ and CaFe${}_2$As${}_2$
• Electronic Structure of the BaFe${}_2$As${}_2$ Family of Iron Pnictides
• Homogeneous vs. inhomogeneous coexistence of magnetic order and superconductivity probed by NMR in Co and K doped iron pnictides
• Universality of superconducting gaps in overdoped Ba0.3K0.7Fe2As2 observed by angle-resolved photoemission spectroscopy
• Resistivity and upper critical field in KFe${}_2$As${}_2$ single crystals
• Observation of an Orbital Selective Electron-Mode Coupling in Fe-Based High-$T_c$ Superconductors
• Electron-Hole Asymmetry in Superconductivity of Pnictides Originated from the Observed Rigid Chemical Potential Shift
• Correlation effects in the iron pnictides
• Synthesis, anisotropy, and superconducting properties of LiFeAs single crystal
• Superconductivity at 23 K and Low Anisotropy in Rb-Substituted BaFe_2As_2 Single Crystals
• Incoherent Cooper pairing and pseudogap behavior in single-layer FeSe/SrTiO${}_3$
• Th substituted SmFeAsO: structural details and superconductivity with Tc above 50 K
• Evidence of quantum criticality in the phase diagram of K${}_x$Sr${}_{1-x}$Fe${}_2$As${}_2$ from measurements of transport and thermoelectricity
• Electron-phonon coupling and charge gap in spin-density-wave iron-pnictides from quasiparticle relaxation dynamics
• Crystallography and Physical Properties of BaCo2As2, Ba{0.94}K{0.06}Co2As2 and Ba{0.78}K{0.22}Co2As2
• Spin-phonon coupling and pressure effect in the superconductor LiFeAs : Lattice dynamics from first-principles calculations
• Magnetic and lattice coupling in single-crystal SrFe${}_2$As${}_2$: A neutron scattering study
• Magnetotransport studies of EuFe${}_2$As${}_2$: the influence of the Eu${}^{2+}$ magnetic moments
• Quantum oscillations of the superconductor LaRu${}_2$P${}_2$ : comparable mass enhancement $\lambda \approx 1$ in Ru and Fe phosphides
• Superconductivity in a layered cobalt oxychalcogenide Na${}_2$CoSe${}_2$O with a triangular lattice
• Evidence for Coexistence of Superconductivity and Magnetism in Single Crystals of Co-doped SrFe${}_2$As${}_2$
• Experimental investigation of the electronic structure of Ca${}_{0.83}$La${}_{0.17}$Fe${}_2$As${}_2$
• Upper critical field of the 122-type iron pnictide superconductors
• Genuine Electronic Structure and Superconducting Gap Structure in (Ba${}_{0.6}$K${}_{0.4}$)Fe${}_2$As${}_2$ Superconductor
• Magnetic-Field-Induced Spin Nematicity in FeSe1-xSx and FeSe1-yTey Superconductor Systems
• Emergence of Superconductivity from Fully Incoherent Normal State in an Iron-Based Superconductor (Ba${}_{0.6}$K${}_{0.4}$)Fe${}_2$As${}_2$
• Common ($\pi$,$\pi$) Band Folding and Surface Reconstruction in FeAs-Based Superconductors
• Electronic layer decoupling driven by density-wave order in La${}_4$Ni${}_3$O${}_{10}$
• Observation of a ubiquitous three-dimensional superconducting gap function in optimally-doped Ba${}_{0.6}$K${}_{0.4}$Fe${}_2$As${}_2$