Resistivity Anisotropy of $AE$Fe${}_2$As${}_2$ ($AE$ =Ca, Sr, Ba): direct versus Montgomery technique measurements

Abstract

The anisotropy of electrical resistivity was measured in parent compounds of the iron-arsenic high temperature superconductors, AEFe2As2 with Alkali Earth elements AE=Ca,Sr, Ba. Measurements were performed using both the Montgomery technique and direct resistivity measurements on samples cut along principal crystallographic directions. The anisotropy ratio γ_ρ=ρ_c/ρ_a is well below 10 for all compounds in the whole temperature range studied (4 to 300 K), in notable contrast to previous reports. The anisotropy at room temperature increases from about 2 in Ca, to about 4 in Sr and Ba. In all compounds the resistivity ratio decreases on cooling through the structural/antiferromagnetic transition temperature T_{SM}, with the change mainly coming from stronger variation in ρ_a as compared with ρ_c. This suggests that the transitions stronger affect the two-dimensional parts of the Fermi surface. We compare our experimental observations with band structure calculations, and find similar trend in the evolution of anisotropy with the size of AE ion. Our results show that the electronic structure of the iron pnictides has large contribution from three-dimensional areas of the Fermi surface.

References in corpus (20)

• BoltzTraP. A code for calculating band-structure dependent quantities
• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
• Effects of Co substitution on thermodynamic and transport properties and anisotropic $H_{c2}$ in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ single crystals
• Superconductivity up to 29 K in SrFe2As2 and BaFe2As2 at high pressures
• Electronic Structure and Doping in BaFe${}_2$As${}_2$ and LiFeAs: Density Functional Calculations
• The challenge of unravelling magnetic properties in LaFeAsO
• Pressure-induced volume-collapsed tetragonal phase of CaFe2As2 as seen via neutron scattering
• First order structural phase transition in CaFe${}_2$As${}_2$
• Vortex phase diagram of Ba(Fe0.93Co0.07)2As2 single crystals
• Anisotropy in the electrical resistivity and susceptibility of superconducting BaFe${}_2$As${}_2$ single crystals
• Structural and magnetic phase transitions in the ternary iron arsenides SrFe2As2 and EuFe2As2
• Iron-based layered superconductor LaO${}_{1-x}$F${}_x$FeAs: an antiferromagnetic semimetal
• Anisotropy of the Optimally-Doped Iron Pnictide Superconductor Ba(Fe0.926Co0.074)2As2
• 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
• Unconventional London penetration depth in Ba(Fe0.93Co0.07)2As2 single crystals
• Penetration depth study of superconducting gap structure of 2\textit{H}-NbSe${}_2$
• Unpaired Electrons in the Heavy-Fermion Superconductor CeCoIn_{5}
• Non-exponential London penetration depth in Ba${}_{1-}$K${}_x$Fe${}_2$As${}_2$ single crystals
• Anisotropic London Penetration Depth and Superfluid Density in Single Crystals of Iron-based Pnictide Superconductors

Cited by in corpus (58)

• The Puzzle of High Temperature Superconductivity in Layered Iron Pnictides and Chalcogenides
• Uniaxial strain detwinning of CaFe2As2 and BaFe2As2: optical and transport study
• Temperature-doping phase diagrams for Ba(Fe1-xTMx)2As2(TM=Ni, Cu, Cu / Co) single crystals
• London Penetration Depth in Iron - based Superconductors
• Nodes in the gap structure of the iron-arsenide superconductor Ba(Fe_{1-x}Co_x)_2As_2 from c-axis heat transport measurements
• Anisotropic thermodynamic and transport properties of single crystalline CaKFe${}_4$As${}_4$
• Intrinsic pinning on structural domains in underdoped single crystals of Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Physical and magnetic properties of Ba(Fe${}_{1-x}$Ru${}_x$)${}_2$As${}_2$ single crystals
• Superconducting and ferromagnetic phases induced by lattice distortions in SrFe2As2
• Phonon anomaly in BaFe2As2
• Physical and magnetic properties of Ba(Fe_(1-x)Mn_x)_2As_2 single crystals
• Synthesis, anisotropy, and superconducting properties of LiFeAs single crystal
• Non-monotonic pressure evolution of the upper critical field in superconducting FeSe
• A comprehensive scenario of the single crystal growth and doping dependence of resistivity and anisotropic upper critical fields in (Ba${}_{1-x}$K${}_x$)Fe${}_2$As${}_2$ ($0.22\le x\le 1$)
• In-plane anisotropy of electrical resistivity in the strain-detwinned SrFe2As2
• Magneto-optical study of Ba(Fe${}_{1-x}$T${}_x$)${}_2$As${}_2$ (T=Co, Ni) single crystals irradiated with heavy-ions
• Dome of magnetic order inside the nematic phase of sulfur-substituted FeSe under pressure
• First-Principles Study for the Anisotropy of Iron-based Superconductors toward Power and Device Applications
• Giant anisotropy in superconducting single crystals of CsCa${}_2$Fe${}_4$As${}_4$F${}_2$
• Anisotropic superconductivity and magnetism in single-crystal RbEuFe${}_4$As${}_4$
• Crystals, magnetic and electronic properties of a new ThCr2Si2-type BaMn2Bi2 and K-doped compositions
• Critical current and vortex dynamics in single crystals of Ca(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Dichotomy between in-plane magnetic susceptibility and resistivity anisotropies in extremely strained $BaF{e}_{2}A{s}_2$
• Resistivity and Hall effect of LiFeAs: Evidence for electron-electron scattering
• Influence of Magnetism on Phonons in CaFe2As2 Via Inelastic X-ray Scattering
• Evolution of normal and superconducting properties of single crystals of Na${}_{1-\delta }$FeAs upon interaction with environment
• Upper critical field of isoelectron substituted SrFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Measurement of the c-axis optical reflectance of AFe${}_2$As${}_2$ (A=Ba, Sr) single crystals: Evidence of different mechanisms for the formation of two energy gaps
• Upper critical field of high quality single crystals of KFe${}_2$As${}_2$
• Anisotropic resistivity of Na${}_{1-\delta }$Fe${}_{1-x}$Co${}_x$As
• Effect of Molybdenum 4d Hole Substitution in BaFe2As2
• Systematics of the temperature-dependent inter-plane resistivity in Ba(Fe${}_{1-x}$T${}_x$)${}_2$As${}_2$ with T= Rh, Ni, and Pd
• Interplane resistivity of underdoped single crystals (Ba${}_{1-x}$K${}_x$)Fe${}_2$As${}_2$, $0\le x<0.34$
• Anisotropic electrical resistivity of LaFeAsO: evidence for electronic nematicity
• Optical properties of $A$Fe${}_2$As${}_2$ ($A=$Ca, Sr, and Ba) single crystals
• Spin-Density-Wave Gap with Dirac Nodes and Two-Magnon Raman Scattering in BaFe2As2
• Anisotropic physical properties and large critical current density in KCa${}_2$Fe${}_4$As${}_4$F${}_2$ single crystal
• On the dual role of the d-electrons in iron-pnictides
• Inter-plane resistivity of isovalent doped BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Anisotropic magnetism, resistivity, London penetration depth and magneto-optical imaging of superconducting K0.80Fe1.76Se2 single crystals
• Filamentary superconductivity across the phase diagram of Ba(Fe,Co)${}_2$As${}_2$
• Two-dimensional magnetic interactions in LaFeAsO
• Superconductivity in Undoped Single Crystals of BaFe2As2: Field and Current Dependence
• Crossover from itinerant to localized states in the thermoelectric oxide [Ca${}_2$CoO${}_3$]${}_{0.62}$[CoO${}_2$]
• Optical properties and electronic structure of the nonmetallic metal FeCrAs
• Three dimensionality of band structure and a large residual quasiparticle population in Ba${}_{0.67}$K${}_{0.33}$Fe${}_2$As${}_2$ as revealed by the c-axis polarized optical measurement
• Comprehensive study of out-of-plane transport properties in BaFe${}_2$As${}_2$: Three-dimensional electronic state and effect of chemical substitution
• The influence of spin fluctuations on the thermal conductivity in superconducting Ba(Fe_{1-x}Co_x)_2As_2
• Superconductivity and magnetic and transport properties of single-crystalline CaK(Fe${}_{1-x}$Cr${}_x$)${}_4$As${}_4$
• Pseudogap and Strong Pairing Induced by Incipient and Shallow Bands in the Quasi-Two-Dimensional KCa${}_2$Fe${}_4$As${}_4$F${}_2$
• Physical Properties of $B{a}_{2}M{n}_{2}S{b}_{2}O$ Single Crystals
• Fermi-surface reconstruction involving two Van Hove singularities across the antiferromagnetic transition in BaFe2As2
• Vibrational anomalies in AFe${}_2$As${}_2$ (A$=$Ca, Sr, and Ba) single crystals
• Mismatch of conductivity anisotropy in the mixed and normal states of type-II superconductors
• Itinerant G-type antiferromagnet SrCr2As2 studied by magnetization, heat capacity, electrical resistivity, and NMR measurements
• Electronic layer decoupling driven by density-wave order in La${}_4$Ni${}_3$O${}_{10}$
• Synthesis and physical properties of the new potassium iron selenide superconductor K0.80Fe1.76Se2
• Superconductivity in the Iron-Pnictide Parent Compound SrFe2As2