Superconducting fluctuations in isovalently-substituted BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$: Possible observation of multiband effects

Abstract

The nature of superconducting fluctuation effects in the isovalently-substituted iron pnictide BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$ (x=0.35) is probed through measurements of the magnetization and magnetoconductivity around the superconducting transition. The results, obtained with magnetic fields up to 9 T applied in the two main crystal directions, are consistent with anisotropic Ginzburg-Landau (GL) approaches for finite applied magnetic fields. The analysis allowed to determine with accuracy the out-of-plane, ${\xi }_c(0)$, and in-plane, ${\xi }_{ab}(0)$, GL coherence lengths. Significant differences are found between the ${\xi }_c(0)$ values resulting from electrical transport and magnetization data. According to recent theoretical approaches, these differences could be interpreted in terms of the multiband nature of this material. The analysis of data in the low field region around the transition temperature also suggests that phase fluctuations, although possibly relevant in other Fe-based superconductors, may play a negligible role in this compound.

arXiv comment12 pages (2 columns), 9 figures

References in corpus (61)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• The Puzzle of High Temperature Superconductivity in Layered Iron Pnictides and Chalcogenides
• High-temperature superconductivity in iron-based materials
• Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO${}_{1-x}$F${}_x$FeAs
• Orbital Fluctuation Mediated Superconductivity in Iron Pnictides: Analysis of Five Orbital Hubbard-Holstein Model
• Superconductivity at 52 K in iron-based F-doped layered quaternary compound Pr[O1-xFx]FeAs
• Upper critical fields and thermally-activated transport of Nd(O_0.7F_0.3)FeAs single crystal
• Superconductivity up to 30 K in the vicinity of quantum critical point in BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• New Fe-based superconductors: properties relevant for applications
• Violation of Anderson's Theorem for Sign-Reversing s-Wave State of Iron-Pnictide Superconductors
• Microwave Penetration Depth and Quasiparticle Conductivity in PrFeAsO_1-y Single Crystals : Evidence for a Full-Gap Superconductor
• 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
• Evolution of the Fermi surface of BaFe_2(As_{1-x}P_x)_2 on entering the superconducting dome
• Microscopic derivation of two-component Ginzburg-Landau model and conditions of its applicability in two-band systems
• Microscopic theory of type-1.5 superconductivity in multiband systems
• Upper critical field in dirty two-band superconductors: breakdown of the anisotropic Ginzburg-Landau theory
• Superconductivity in Ru substituted BaFe2-xRuxAs2
• Disorder-induced topological change of the superconducting gap structure in iron pnictides
• Magnetic penetration depth of single crystal SmFeAsO_{1-x}F_y: a fully gapped superconducting state
• Thermodynamic phase diagram of Fe(Se${}_{0.5}$Te${}_{0.5}$) single crystals up to 28 Tesla
• Possible three dimensional nodes in the $s\pm$ superconducting gap of BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Ginzburg-Landau theory for multiband superconductors: microscopic derivation
• Leggett modes in iron-based superconductors as a probe of Time Reversal Symmetry Breaking
• Upper critical field and fluctuation conductivity in the critical regime of doped SmFeAsO
• Charge doping-induced quasiparticle scattering in iron-pnictide superconductors as probed by vortex pinning
• On the consequences of the uncertainty principle on the superconducting fluctuations well inside the normal state
• Structural and magnetic phase transitions near optimal superconductivity in BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Fluctuoscopy of Disordered Two-Dimensional Superconductors
• Anomalous critical fields in quantum critical superconductors
• Superconducting Gap Structure of LaFePO Studied by Thermal Conductivity
• Evidence for Anisotropic Vortex Dynamics and Pauli Limitation in the Upper Critical Field of FeSe1-xTex
• The specific heat jump at the superconducting transition and the quantum critical nature of the normal state of Pnictide superconductors
• Anisotropic Phase Diagram and Superconducting Fluctuations in SmFeAsO0.85F0.15
• Superconducting gap with sign reversal between hole pockets in heavily hole-doped Ba1-xKxFe2As2
• Specific Heat vs Field in the 30 K Superconductor BaFe2(As0.7P0.3)2
• Theory of fluctuation conductivity from interband pairing in pnictide superconductors
• Superconducting fluctuations in the reversible magnetization of the iron-pnictide $B{a}_{1-x}{K}_{x}F{e}_{2}A{s}_2$
• Anisotropic fluctuations and quasiparticle excitations in FeSe_0.5Te_0.5
• Anomalous precursor diamagnetism at low reduced magnetic fields and the role of Tc inhomogeneities in the superconductors Pb55In45 and underdoped La1.9Sr0.1CuO4
• Nodeless superconductivity in the presence of spin-density wave in pnictide superconductors: The case of BaFe${}_{2-x}$Ni${}_x$As${}_2$
• Disorder, critical currents, and vortex pinning energies in isovalently substituted BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Observation of anisotropic diamagnetism above the superconducting transition in iron-pnictide Ba_(1-x)K_xFe2As2 single crystals due to thermodynamic fluctuations
• Superconducting phase fluctuations in SmFeAsO${}_{0.8}$F${}_{0.2}$ from diamagnetism at low magnetic field above $T_c$
• Diamagnetism around the Meissner transition in a homogeneous cuprate single crystal
• Structural and Tc inhomogeneities inherent to doping in La_{2-x}Sr_xCuO_4 superconductors and their effects on the precursor diamagnetism
• Statistics of subgap states in $s_{\pm }$ superconductors
• Anisotropic Superconducting Properties of Optimally Doped BaFe${}_2$(As${}_{0.65}$P${}_{0.35}$)${}_2$ under Pressure
• Measurements of the superconducting fluctuations in optimally-doped BaFe${}_{2-x}$Ni${}_x$As${}_2$ under high magnetic fields: Probing the 3D anisotropic Ginzburg-Landau approach
• Upper critical fields and critical current density of BaFe2(As0.68P0.32)2 single crystal
• In-plane and transverse superconducting fluctuation diamagnetism in the presence of charge-density waves in 2H-NbSe2 single crystals
• Paraconductivity of K-doped SrFe2As2 superconductor
• Measurements of the fluctuation-induced in-plane magnetoconductivity at high reduced temperatures and magnetic fields in the iron arsenide BaFe(2-x)NixAs2
• The diamagnetism above the superconducting transition in underdoped La(1.9)Sr(0.1)CuO(4) revisited: Chemical disorder or phase incoherent superconductivity?
• Fluctuation diamagnetism around the superconducting transition in a cuprate crystal with a reduced Meissner fraction
• Fluctuations in two-band superconductors in a strong magnetic field
• Non-conventional superconducting fluctuations in Ba(Fe1-xRhx)2As2 iron-based superconductors
• Nodeless two-gap superconductivity in stoichiometric iron pnictide LiFeAs
• Direct measurement of the temperature dependence of the magnetic penetration depth in Ba(Fe${}_{1-x}$Ni${}_x$)${}_2$As${}_2$ superconductors
• Critical and Gaussian conductivity fluctuations in BaFe1.9Ni0.1As2 superconductor
• Three-dimensional anisotropic fluctuation diamagnetism around the superconducting transition of Ba(1-x)KxFe2As2 single crystals in the finite-field (or Prange) regime
• Large increase of the anisotropy factor in the overdoped region of Ba(Fe${}_{1-x}$Ni${}_x$)${}_2$As${}_2$ as probed by fluctuation spectroscopy

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