Local measurement of the superfluid density in the pnictide superconductor Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ across the superconducting dome

Abstract

We measure the penetration depth ${\lambda }_{ab}(T)$ in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ using local techniques that do not average over the sample. The superfluid density ${\rho }_s(T)\equiv 1/{\lambda }_{ab}(T{)}^2$ has three main features. First, ${\rho }_s(T=0)$ falls sharply on the underdoped side of the dome. Second, ${\lambda }_{ab}(T)$ is flat at low $T$ at optimal doping, indicating fully gapped superconductivity, but varies more strongly in underdoped and overdoped samples, consistent with either a power law or a small second gap. Third, ${\rho }_s(T)$ varies steeply near $T_c$ for optimal and underdoping. These observations are consistent with an interplay between magnetic and superconducting phases.

References in corpus (29)

• Unconventional sign-reversing superconductivity in LaFeAsO_(1-x)F_x
• 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
• Determination of the phase diagram of the electron doped superconductor Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Anomalous suppression of the orthorhombic distortion in superconducting Ba[Fe(1-x)Cox]2As2
• Magnetic Penetration Depth in Unconventional Superconductors
• Normal-State Spin Dynamics and Temperature-Dependent Spin Resonance Energy in an Optimally Doped Iron Arsenide Superconductor
• Competition and coexistence of antiferromagnetism and superconductivity in underdoped Ba(Fe0.953Co0.047)2As2
• Critical change in the Fermi surface of iron arsenic superconductors at the onset of superconductivity
• Line nodes in the energy gap of high-temperature superconducting BaFe_2(As_{1-x}P_x)_2 from penetration depth and thermal conductivity measurements
• A neutron scattering study of the interplay between structure and magnetism in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Microwave Surface-Impedance Measurements of the Magnetic Penetration Depth in Single Crystal Ba1-xKxFe2As2 Superconductors: Evidence for a Disorder-Dependent Superfluid Density
• Nodes in the gap structure of the iron-arsenide superconductor Ba(Fe_{1-x}Co_x)_2As_2 from c-axis heat transport measurements
• Doping dependence of heat transport in the iron-arsenide superconductor Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$: from isotropic to strongly $k$-dependent gap structure
• Evidence for Nodal Superconductivity in LaFePO from Scanning SQUID Susceptometry
• Interplay between magnetism and superconductivity in Fe-pnictides
• Temperature dependent anisotropy of the penetration depth and coherence length in MgB$_2
• Superfluid density and penetration depth in Fe-pnictides
• The London penetration depth in single crystals of Ba(Fe_{1-x}Co_x)_2As_2 at various doping levels
• Magnetic penetration depth of single crystal SmFeAsO_{1-x}F_y: a fully gapped superconducting state
• Quantum oscillations in the parent pnictide BaFe${}_2$As${}_2$ : itinerant electrons in the reconstructed state
• Local measurement of the penetration depth in the pnictide superconductor Ba(Fe${}_{0.95}$Co${}_{0.05}$)${}_2$As${}_2$
• Band and momentum dependent electron dynamics in superconducting $\mathrm{Ba}(\mathrm{F}{\mathrm{e}}_{1-\mathrm{x}}\mathrm{C}{\mathrm{o}}_{\mathrm{x}}{)}_2\mathrm{A}{\mathrm{s}}_2$ as seen via electronic Raman scattering
• Doping evolution of the absolute value of the London penetration depth and superfluid density in single crystals of Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Non-exponential London penetration depth in Ba${}_{1-}$K${}_x$Fe${}_2$As${}_2$ single crystals
• Coexistence of superconductivity and a spin density wave in pnictides: Gap symmetry and nodal lines
• London penetration depth and strong pair-breaking in iron-based superconductors
• Transfer of optical spectral weight in magnetically ordered superconductors
• Superfluid Density and Field-Induced Magnetism in Ba(Fe1-xCox)2As2 and Sr(Fe1-xCox)2As2 Measured with Muon Spin Relaxation
• Meissner response of anisotropic superconductors

Cited by in corpus (51)

• Gap symmetry and structure of Fe-based superconductors
• Quantum critical point lying beneath the superconducting dome in iron-pnictides
• A Sharp Peak of the Zero-Temperature Penetration Depth at Optimal Composition in BaFe2(As1-xPx)2
• London Penetration Depth in Iron - based Superconductors
• A review of two-band superconductivity: materials and effects on the thermodynamic and reversible mixed-state properties
• Universal self-field critical current for thin-film superconductors
• Crossover from weak to strong pairing in unconventional superconductors
• Nodeless vs nodal order parameters in LiFeAs and LiFeP superconductors
• Competing Orders in a Nearly Antiferromagnetic Metal
• Thermodynamic parameters of single- or multi-band superconductors derived from self-field critical currents
• Universal Lower Limit on Vortex Creep in Superconductors
• Scanning SQUID Susceptometry of a paramagnetic superconductor
• On the origin of critical temperature enhancement in atomically-thin superconductors
• Single-gap superconductivity and dome of superfluid density in Nb-doped SrTiO3
• Distinguishing $s^{\pm }$ and $s^{++}$ electron pairing symmetries by neutron spin resonance in superconducting NaFe${}_{0.935}$Co${}_{0.045}$As
• Universal scaling of the self-field critical current in superconductors: from sub-nanometre to millimetre size
• Neutron-Inelastic-Scattering Peak by Dissipationless Mechanism in the s++ -wave State in Iron-based Superconductors
• Measurements of the lower critical field of superconductors using NV centers in diamond optical magnetometry
• Infrared nano-spectroscopy and imaging of collective superfluid excitations in conventional and high-temperature superconductors
• Entangled Orbital Triplet Pairs in Iron-Based Superconductors
• Using electron irradiation to probe iron - based superconductors
• Local characterization of superconductivity in BaFe2(As1-xPx)2
• Electron Mass Enhancement near a Nematic Quantum Critical Point in NaFe${}_{1-x}$Co${}_x$As
• Superfluid density measurements of Ba(CoxFe1-x)2As2 films near optimal doping
• Direct measurement of the magnetic penetration depth by magnetic force microscopy
• Quantitative assessment of pinning forces and the superconducting gap in NbN thin films from complementary magnetic force microscopy and transport measurements
• The upper critical field of NaFe${}_{1-x}$Co${}_x$As superconductors
• Quantum phase transition inside the superconducting dome of Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ probed by optical magneto-sensing using NV-centers in diamond
• Anomalous proximity effects at the interface of s and s+- superconductors
• ${}^{75}$As NMR of Ba(Fe${}_{0.93}$Co${}_{0.07}$)${}_2$As${}_2$ in High Magnetic Field
• Single Vortex Pinning and Penetration Depth in Superconducting NdFeAsO${}_{1-x}$F${}_x$
• TAO pairing: a fully gapped pairing scenario for the Iron-Based Superconductors
• Reversible Superconductivity in Electrochromic Indium-Tin Oxide Films
• Diamond Magnetometry of Meissner Currents in a Superconducting Film
• Diamagnetic Vortex Barrier Stripes in Underdoped $BaF{e}_2(A{s}_{1-x}{P}_x{)}_2$
• Current distribution across type II superconducting films: a new vortex-free critical state
• Evidence for current suppression in superconductor-superconductor bilayers
• Infrared probe of the gap evolution across the phase diagram of Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$
• Multiband effects on the upper critical field angular dependence of 122-family iron pnictide superconductors
• Agreement between local and global measurements of the London penetration depth
• Magnetic penetration depth in the presence of a spin-density wave in multiband superconductors at zero temperature
• Dependence of the absolute value of the penetration depth in $(\mathbf{B}{\mathbf{a}}_{1-\mathbf{x}}{\mathbf{K}}_{\mathbf{x}})\mathbf{F}{\mathbf{e}}_2\mathbf{A}{\mathbf{s}}_2$ on doping
• Scaling of the physical properties in Ba(Fe,Ni)2As2 single crystals: Evidence for quantum fluctuations
• A polarized neutron diffraction study of the field-induced magnetization in the normal and superconducting states of Ba(Fe1-xCox)2As2 (x=0.65)
• Direct measurement of the temperature dependence of the magnetic penetration depth in Ba(Fe${}_{1-x}$Ni${}_x$)${}_2$As${}_2$ superconductors
• Anomalous superfluid density in a disordered charge density wave material: Pd-intercalated ErTe${}_3$
• Calculation of the effect of random superfluid density on the temperature dependence of the penetration depth
• The magnetic penetration depth influenced by the proximity to the surface
• On the determination of the quasiparticle scattering rate in unconventional superconductors by microwave surface impedance
• Magnetic nonreciprocity in a hybrid device of asymmetric artificial spin-ice-superconductors
• Imaging flux distributions around superconductors: Geometrical susceptibility in the Meissner state