Electrodynamics of electron doped iron-pnictide superconductors: Normal state properties

Abstract

The electrodynamic properties of Ba(Fe${}_{0.92}$Co${}_{0.08}{)}_2$As${}_2$ and Ba(Fe${}_{0.95}$Ni${}_{0.05}{)}_{A}s$_{2}$singlecrystalshavebeeninvestigatedbyreflectivitymeasurementsinawidefrequencyrange.Inthemetallicstate,theopticalconductivityconsistsofabroadincoherentbackgroundandanarrowDrude-likecomponentwhichdeterminesthetransportproperties;onlythelattercontributionstronglydependsonthecompositionandtemperature.Thissubsystemrevealsa$T^2$behaviorinthedcresistivityandscatteringratedisclosingahiddenFermi-liquidbehaviorinthe122iron-pnictidefamily.AnextendedDrudeanalysisyieldsthefrequencydependenceoftheeffectivemass(with$m^*/m_b\approx 5$ in the static limit) and scattering rate that does not disclose a simple power law. The spectral weight shifts to lower energies upon cooling; a significant fraction is not recovered within the infrared range of frequencies.

13 pages, 9 figures

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• Electronic correlations in the iron pnictides
• Fermi surface nesting induced strong pairing in iron-based superconductors
• Superconductivity up to 30 K in the vicinity of quantum critical point in BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Superconductivity induced by Ni doping in BaFe${}_2$As${}_2$
• Origin of the spin density wave instability in AFe${}_2$As${}_2$ (A=Ba, Sr) as revealed by optical spectroscopy
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• Unified explanation of the Kadowaki-Woods ratio in strongly correlated materials
• Hall effect and resistivity study of the magnetic transition, carrier content and Fermi liquid behavior in Ba(Fe(1-x) Cox)2As2
• Electron Correlations in the Low Carrier Density LaFeAsO0.89F0.11 Superconductor (Tc = 28 K)
• Momentum dependence of the superconducting gap in Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$
• (pi,pi)-electronic order in iron arsenide superconductors
• Probing superconducting energy gap from infrared spectroscopy on a Ba${}_{0.6}$K${}_{0.4}$Fe${}_2$As${}_2$ single crystal with T${}_c$=37 K
• The ground state of heavily-overdoped non-superconducting La${}_{2-x}$Sr${}_x$CuO${}_4$
• A Large Iron Isotope Effect in SmFeAsO1-xFx and Ba1-xKxFe2As2
• First Order Phase Transition and Superconductivity in BaNi2As2 Single Crystals
• Universal Decomposition of the Low-Frequency Conductivity Spectra of Iron-Pnictides Uncovering Fermi-Liquid Behavior
• Evolution of the optical spectrum with doping in iron pnictides Ba(Fe1-xCox)2As2
• Metamagnetic transition in EuFe${}_2$As${}_2$ single crystals
• Electronic Structure of the BaFe${}_2$As${}_2$ Family of Iron Pnictides
• Structure and Anisotropic Properties of BaFe2-xNixAs2 (x = 0, 1, 2) Single Crystals
• Inverse Iron Isotope Effect on the transition temperature of the (Ba,K)Fe2As2 superconductor
• Effects of the magnetic orderings on the dynamical conductivity: optical investigations of EuFe${}_2$As${}_2$ single crystals
• Evidence for multiple superconducting gaps in optimally doped BaFe${}_{1.87}$Co${}_{0.13}$As${}_2$ from infrared spectroscopy
• Fermi surface reconstruction in high-Tc superconductors
• Phonon anomaly in BaFe2As2
• Optical spectroscopy of superconducting Ba{0.55}K{0.45}Fe2As2: evidence for strong coupling to low energy bosons
• Demonstrating the model nature of the high-temperature superconductor HgBa${}_2$CuO${}_{4+\Delta }$
• Electronic correlations and unusual superconducting response in the optical properties of the iron-chalcogenide FeTe0.55Se0.45
• Optical properties of BaFe${}_{2-x}$Co${}_x$As${}_2$
• Direct observation of a nodeless superconducting energy gap in the optical conductivity of iron-pnictides
• The Nature of Heavy Quasiparticles in Magnetically Ordered Heavy Fermions
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• Optical and Raman spectroscopy studies on Fe-based superconductors
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• Optical spectroscopy study on single crystalline LaFeAsO
• Electrodynamics of correlated electron matter
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• Systematic Study on Fluorine-doping Dependence of Superconducting and Normal State Properties in LaFePO1-xFx
• Dominant role of local-moment interactions in the magnetism in iron pnictides : comparative study of arsenides and antimonides from first-principles

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• The Puzzle of High Temperature Superconductivity in Layered Iron Pnictides and Chalcogenides
• Use of X-ray scattering functions in Kramers-Kronig analysis of reflectance
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• Coexistence and competition of the short-range incommensurate antiferromagnetic order with superconductivity in BaFe2-xNixAs2
• Surface impedance and optimum surface resistance of a superconductor with imperfect surface
• Optical properties of the iron-arsenic superconductor BaFe1.85Co0.15As2
• Transport properties and asymmetric scattering in Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ single crystals compared to the electron doped counterparts Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$}
• Normal-state charge dynamics in doped BaFe2As2: Roles of doping and necessary ingredients for superconductivity
• Doping dependence of femtosecond quasi-particle relaxation dynamics in Ba(Fe,Co)_2As_2 single crystals: possible evidence for normal state nematic fluctuations
• Pressure-dependent optical investigations of $\alpha$-(BEDT-TTF)${}_2$I${}_3$: tuning charge order and narrow gap towards a Dirac semimetal
• High energy pseudogap and its evolution with doping in Fe-based superconductors as revealed by optical spectroscopy
• Cavity superconductor-polaritons
• Electronic correlations in iron-pnictide superconductors and beyond; what can we learn from optics
• Optical conductivity and Raman scattering of iron superconductors
• Optical conductivity of iron-based superconductors
• Anisotropic quasiparticle lifetimes in Fe-based superconductors
• Optical conductivity of superconducting Rb2Fe4Se5
• Non-equilibrium Pair Breaking in Ba(Fe1-xCox)2As2 Superconductors: Evidence for Formation of Photo-Induced Excitonic Spin-Density-Wave State
• Unconventional Hall effect in pnictides from interband interactions
• Extended Drude model and role of interband transitions in the mid-infrared spectra of pnictides
• Universal pair-breaking in transition metal-substituted iron-pnictide superconductors
• Effects of Fermi-surface shrinking on the optical sum rule in pnictides
• Unique interplay between superconducting and ferromagnetic orders in EuRbFe${}_4$As${}_4$
• High-T${}_c$ cuprates: a story of two electron subsystems
• Macroscopic phase segregation in superconducting K0.73Fe1.67Se2 as seen by muon spin rotation and infrared spectroscopy
• Evidence of hot and cold spots on the Fermi surface of LiFeAs
• Eliashberg Analysis of Optical Spectra Reveals Strong Coupling of Charge Carriers to Spin Fluctuations in Superconducting Iron Pnictides
• Spin-density-wave-induced anomalies in the optical conductivity of AFe2As2, (A=Ca, Sr, Ba) single-crystalline iron pnictides
• Optical investigations of the chemical pressurized EuFe2(As1-xPx)2: an s-wave superconductor with strong interband interaction
• Correlation, doping and interband effects on the optical conductivity of iron superconductors
• Effective medium approximation and the complex optical properties of the inhomogeneous superconductor K_{0.8}Fe_{2-y}Se_2
• Electronic transport and magnetism in the alternating stack of metallic and highly frustrated magnetic layers in Co${}_{1/3}$NbS${}_2$
• Scattering dominated high-temperature phase of 1T-TiSe2: an optical conductivity study
• Muon spin rotation and infrared spectroscopy study of $B{a}_{1-x}N{a}_{x}F{e}_{2}A{s}_2$
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• Optical properties of the iron-chalcogenide superconductor FeTe0.55Se0.45
• Optical and Hidden Transport Properties of BaFe${}_{1.91}$Ni${}_{0.09}$As${}_2$ Film
• Optical properties of superconducting EuFe2(As1-xPx)2
• Electrodynamics of BaFe2As2 from infrared measurements under pressure
• Ultralow-dissipative conductivity by Dirac fermions in BaFe${}_2$As${}_2$
• Characterization of two electronic subsystems in cuprates through optical conductivity
• Reentrant phases in electron-doped ${\text{EuFe}}_2{\text{As}}_2$: spin glass and superconductivity
• Transmittance and reflectance measurements at terahertz frequencies on a superconducting BaFe_{1.84}Co_{0.16}As_2 ultrathin film: an analysis of the optical gaps in the Co-doped BaFe_2As_2 pnictide
• Role of electron-electron interactions in the charge dynamics of rare-earth-doped CaFe2As2
• Electronic Scattering Effects in Europium-Based Iron Pnictides
• Optical Study of BaFe${}_2$As${}_2$ under pressure: Coexistence of spin-density-wave gap and superconductivity
• Superconducting gap in BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$ from temperature dependent transient optical reflectivity
• Pressure suppression of spin-density-wave gap in the optical conductivity of SrFe2As2
• Ultrafast Relaxation Dynamics of Spin-Density Wave Order in BaFe${}_2$As${}_2$ under High Pressures
• High-entropy magnetism of murunskite
• Cuprates, Pnictides and Sulfosalts: Lessons in Functional Materials
• Can disorder act as a chemical pressure? An optical study of the Hubbard model