Microwave Penetration Depth and Quasiparticle Conductivity in PrFeAsO_1-y Single Crystals : Evidence for a Full-Gap Superconductor

Abstract

In-plane microwave penetration depth ${\lambda }_{ab}$ and quaiparticle conductivity at 28 GHz are measured in underdoped single crystals of the Fe-based superconductor PrFeAsO${}_{1-y}$ ($T_c\approx 35$ K) by using a sensitive superconducting cavity resonator. ${\lambda }_{ab}(T)$ shows flat dependence at low temperatures, which is incompatible with the presence of nodes in the superconducting gap $\Delta (\mathbf{k})$. The temperature dependence of the superfluid density demonstrates that the gap is non-zero ($\Delta /k_B{T}_c\gtrsim 1.6$) all over the Fermi surface. The microwave conductivity below $T_c$ exhibits an enhancement larger than the coherence peak, reminiscent of high-$T_c$ cuprate superconductors.

4 pages, 3 figures. Version accepted for publication in Phys. Rev. Lett. For related results of hole-doped 122 system, see arXiv:0810.3506

References in corpus (25)

• Unconventional sign-reversing superconductivity in LaFeAsO_(1-x)F_x
• Superconductivity at 43 K in Samarium-arsenide Oxides $SmFeAs{O}_{1-x}{F}_x$
• Unconventional pairing originating from disconnected Fermi surfaces in superconducting LaFeAsO${}_{1-x}$F${}_x$}
• LaFeAsO${}_{1-x}$F${}_x$: A low carrier density superconductor near itinerant magnetism
• Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO${}_{1-x}$F${}_x$FeAs
• Structural and magnetic phase diagram of CeFeAsO1-xFx and its relationship to high-temperature superconductivity
• Superconductivity and Phase Diagram in the Iron-based Arsenic-oxides ReFeAsO1-delta (Re = rare earth metal) without F-Doping
• Strong Correlations and Magnetic Frustration in the High Tc Iron Pnictides
• Superconductivity in iron-based F-doped layered quaternary compound Nd[O1-xFx]FeAs
• Thorium-doping induced superconductivity up to 56 K in Gd1-xThxFeAsO
• Superconductivity at 52 K in iron-based F-doped layered quaternary compound Pr[O1-xFx]FeAs
• Magnetic Penetration Depth in Unconventional Superconductors
• Pairing Symmetry in a Two-Orbital Exchange Coupling Model of Oxypnictides
• The BCS-like gap in superconductor SmFeAsO_0.85F_0.15
• 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
• ${}^{75}$As NMR studies of superconducting LaO${}_{0.9}$F${}_{0.1}$FeAs
• Spin-singlet superconductivity with multiple gaps in PrO0.89F0.11FeAs
• Field and Temperature Dependence of the Superfluid Density in LaO_{1-x}F_xFeAs Superconductors: A Muon Spin Relaxation Study
• Superconductivity at 53.5 K in GdFeAsO1-delta
• Point-Contact Spectroscopy of Iron-Based Layered Superconductor LaO${}_{0.9}$F${}_{0.1-\delta }$FeAs
• 75As NQR/NMR Studies on Oxygen-deficient Iron-based Oxypnictide Superconductors LaFeAsO_{1-y} (y=0,0.25,0.4) and NdFeAsO_{0.6}
• Temperature dependent anisotropy of the penetration depth and coherence length in MgB$_2
• Nodal Superconductivity with Multiple Gaps in SmFeAsO${}_{0.9}$F${}_{0.1}$
• Orbital fluctuation mechanism for superconductivity in iron-based compounds
• Effects of Rattling Phonons on the Quasiparticle Excitation and Dynamics in the Superconducting $\beta$-Pyrochlore KOs${}_2$O${}_6$

Cited by in corpus (151)

• The Puzzle of High Temperature Superconductivity in Layered Iron Pnictides and Chalcogenides
• Superconductivity in Iron Compounds
• High-temperature superconductivity in iron-based materials
• Gap symmetry and structure of Fe-based superconductors
• To What Extent Iron-Pnictide New Superconductors Have Been Clarified: A Progress Report
• Pnictogen height as a possible switch between high-T_c nodeless and low-T_c nodal pairings in the iron based superconductors
• Reply to Comment on "Unconventional s-wave superconductivity in Fe(Se,Te)"
• Iron-Based Superconductors: current status of materials and pairing mechanism
• Pairing Symmetry and Pairing State in Ferropnictides: Theoretical Overview
• Comparison of Ab initio Low-Energy Models for LaFePO, LaFeAsO, BaFe2As2, LiFeAs, FeSe and FeTe: Electron Correlation and Covalency
• Violation of Anderson's Theorem for Sign-Reversing s-Wave State of Iron-Pnictide Superconductors
• 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
• Spin fluctuations and superconductivity in a 3D tight-binding model for BaFe2As2
• Evidence for nodal superconductivity in LaFePO
• Three orbital model for the iron-based superconductors
• London Penetration Depth in Iron - based Superconductors
• Evidence for superconducting gap nodes in the zone-centered hole bands of KFe2As2 from magnetic penetration-depth measurements
• Pairing State with a time-reversal symmetry breaking in FeAs based superconductors
• Microwave Surface-Impedance Measurements of the Magnetic Penetration Depth in Single Crystal Ba1-xKxFe2As2 Superconductors: Evidence for a Disorder-Dependent Superfluid Density
• Fully Gapped Superconducting State Based on a High Normal State Quasiparticle Density of States in Ba${}_{0.6}$K${}_{0.4}$Fe${}_2$As${}_2$ Single Crystals
• Low temperature specific heat of the hole-doped Ba_{0.6}K_{0.4}Fe_2As_2 single crystals and electron-doped SmFeAsO_{0.9}F_{0.1} samples
• Unconventional London penetration depth in Ba(Fe0.93Co0.07)2As2 single crystals
• Superfluid density of the $\pm$s-wave state for the iron-based superconductors
• Resonant impurity scattering in the $\pm$s-gap state of the Fe-based superconductors
• Integer and half-integer flux-quantum transitions in a niobium/iron-pnictide loop
• Studies of Impurity-Doping Effects and NMR Measurement5s of La1111 and/or Nd 1111 Fe-Pnictide Superconductors
• Electronic Structure Calculation by First Principles for Strongly Correlated Electron Systems
• Momentum dependence and nodes of the superconducting gap in iron-pnictides
• A review of two-band superconductivity: materials and effects on the thermodynamic and reversible mixed-state properties
• 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${}_2$
• Lifting of nodes by disorder in extended-$s$ state superconductors: application to ferropnictides
• Momentum-resolved superconducting gap in the bulk of Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ from combined ARPES and $\mu$SR measurements
• Structure of Neutron-Scattering Peak in both s++ wave and s+- wave states of an Iron pnictide Superconductor
• Evidence for Nodal Superconductivity in LaFePO from Scanning SQUID Susceptometry
• Single Crystal Growth and Characterization of the Iron-Based Superconductor KFe2As2 Synthesized by KAs Flux Method
• Flux pinning in (1111) iron-pnictide superconducting crystals
• Two types of s-wave pairing due to magnetic and orbital fluctuations in the two-dimensional 16-band d-p model for iron-based superconductors
• Properties of a two orbital model for oxypnictide superconductors: Magnetic order, B_2g spin-singlet pairing channel, and its nodal structure
• 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
• Strong-coupling Spin-singlet Superconductivity with Multiple Full Gaps in Hole-doped Ba${}_{0.6}$K${}_{0.4}$Fe${}_2$As${}_2$ Probed by Fe-NMR
• 75As NMR Study of Hole-Doped Superconductor Ba1-xKxFe2As2 (Tc = 38K)
• Non-exponential London penetration depth in RFeAsO${}_{0.9}$F${}_{0.1}$ (R=La,Nd) single crystals
• Nodeless vs nodal order parameters in LiFeAs and LiFeP superconductors
• Renormalization group analysis of competing orders and the pairing symmetry in Fe-based superconductors
• Renormalization group flow, competing phases, and the structure of superconducting gap in multi-band models of Iron based superconductors
• Possible three dimensional nodes in the $s\pm$ superconducting gap of BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Neutron and ARPES Constraints on the Couplings of the Multiorbital Hubbard Model for the Pnictides
• Suppression of the critical temperature of superconducting NdFeAs(OF) single crystals by Kondo-like defect sites induced by alpha-particle irradiation
• London penetration depth and superfluid density in single crystals of Fe(Te,Se) and Fe(Te,S) superconductors
• Charge doping-induced quasiparticle scattering in iron-pnictide superconductors as probed by vortex pinning
• Theory of heterotic SIS Josephson junctions between single- and multi-gap superconductors
• Effects of Ru Doping on the Transport Behavior and Superconducting Transition Temperature of NdFeAsO0.89F0.11
• Contrasting Pair-Breaking Effects by Doping Mn and Zn in Ba0.5K0.5Fe2As2
• Superconducting Properties of the $s^{\pm }$-wave state: Fe-based superconductors
• Magnetic and Metallic State at Intermediate Hubbard U Coupling in Multiorbital Models for Undoped Fe Pnictides
• Superconductivity with extremely large upper critical fields in Nb2Pd0.81S5
• Lower Critical Fields of Superconducting PrFeAsO${}_{1-y}$ Single Crystals
• Large decrease in the critical temperature of superconducting LaFeAsO0.85 compounds doped with 3% atomic weight of nonmagnetic Zn impurities
• Nodeless energy gaps of single-crystalline Ba0.68K0.32Fe2As2 as seen via 75As NMR
• Low-temperature magneto-thermal transport investigation of a Ni-based superconductor BaNi2As2: Evidence for fully gapped superconductivity
• Anisotropic London Penetration Depth and Superfluid Density in Single Crystals of Iron-based Pnictide Superconductors
• Volovik effect in the $\pm$s-wave state for the iron-based superconductors
• Superconducting Gap Structure of LaFePO Studied by Thermal Conductivity
• Impurity-induced in-gap state and Tc in sign-reversing s-wave superconductors: analysis of iron oxypnictide superconductors
• Experimental Detection of Sign-Reversal Pairing in Iron-Based Superconductors
• Neutron-Inelastic-Scattering Peak by Dissipationless Mechanism in the s++ -wave State in Iron-based Superconductors
• Novel properties in Josephson junctions involving the cos(kx)cos(ky)-pairing state in iron-pnictides
• Non-equilibrium phenomena in superconductors probed by femtosecond time-domain spectroscopy
• High-temperature superconductivity stabilized by electron-hole interband coupling in collapsed tetragonal phase of KFe2As2 under high pressure
• Anisotropy of strong pinning in multi-band superconductors
• Anomalous Temperature Dependence of the Superfluid Density Caused by Dirty-to-Clean Crossover in FeSe${}_{0.4}$Te${}_{0.6}$ Single Crystals
• Theory of thermal conductivity in extended-$s$ state superconductors: application to ferropnictides
• Magnetic and superconducting transitions in Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ studied by specific heat
• Microwave Surface Impedance Measurements of LiFeAs Single Crystals
• Small anisotropy of the lower critical field and $s_{\pm }$-wave two-gap feature in single crystal LiFeAs
• Lower critical field and SNS-Andreev spectroscopy of 122-arsenides: Evidence of nodeless superconducting gap
• Possible Sign-Reversing s-Wave Superconductivity in Co-Doped BaFe2As2 Proved by Thermal Transport Measurements
• Andreev spectroscopy of iron-based superconductors: temperature dependence of the order parameters and scaling of the ${\Delta }_{L,S}$ with $T_C$
• Surface density of states of s+-wave Cooper pairs in a two-band model
• Surface-resistance measurements using superconducting stripline resonators
• Probing the pairing symmetry of the iron pnictides with electronic Raman scattering
• Anisotropic fluctuations and quasiparticle excitations in FeSe_0.5Te_0.5
• Spin-Density-Wave and Asymmetry of Coherence Peaks in iron-Pnictide Superconductors from a two-orbital model
• Superfluid density measurements of Ba(CoxFe1-x)2As2 films near optimal doping
• Point-contact spectroscopic studies on normal and superconducting AFe_2As_2-type iron-pnictide single crystals
• Nodeless superconducting gap in electron-doped BaFe${}_{1.9}$Ni${}_{0.1}$As${}_2$ probed by quasiparticle heat transport
• Leggett mode in a strong-coupling model of iron arsenide superconductors
• Systematic ^{75}As NMR study of the dependence of low-lying excitations on F doping in the iron oxypnictide LaFeAs(O_{1-x}F_{x})
• Magnetic impurities in the two-band $s_{\pm }$-wave superconductors
• Cooperative effects of Coulomb and electron-phonon interactions in the two-dimensional 16-band d-p model for iron-based superconductors
• Study of the skin effect in superconducting materials
• Quantum Oscillation Studies of the Fermi Surface of LaFePO
• Unusual disorder effects in superconducting LaFeAs_(1-d)O_0.9F_0.1 as revealed by NMR spectroscopy
• Determination of Superconducting Gap of SmFeAsFxO1-x Superconductors by Andreev Reflection Spectroscopy
• Effect of realistic finite-size impurities on Tc in Fe-based superconductors based on the five-orbital tight-binding model
• Microwave response of superconducting pnictides: extended $s_{\pm }$ scenario
• Critical Slowing Down of Quadrupole and Hexadecapole Orderings in Iron Pnictide Superconductor
• Unconventional multiband superconductivity with nodes in single-crystalline SrFe2(As_0.65P_0.35)2 as seen via 31P-NMR and specific heat
• Thermal conductivity of overdoped BaFe${}_{1.73}$Co${}_{0.27}$As${}_2$ single crystal: Evidence for nodeless multiple superconducting gaps and interband interactions
• Penetration depth, lower critical fields, and quasiparticle conductivity in Fe-arsenide superconductors
• Magnetic penetration depth in disordered iron-based superconductors
• High-pressure growth of fluorine-free SmFeAsO${}_{1-x}$ superconducting single crystals
• Theory of vortex structure in Josephson junctions with multiple tunneling channels: Vortex enlargement as a probe of $\pm s$-wave superconductivity
• Isotope effect and the role of phonon in the Fe-based superconductors
• Evidence for line nodes in the energy gap of the overdoped Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ from low-temperature specific heat measurements
• Evidence for a full energy gap for nickel-pnictide LaNiAsO_{1-x}F_x superconductors by ^{75}As nuclear quadrupole resonance
• Theory of tunnelling into a multi-band superconductor: decoherence and interference
• Analysis of transport properties of iron pnictides: spin-fluctuation scenario
• Normal State Spin Dynamics of Five-band Model for Iron-pnictides
• Coherence Effect of Sign-Reversing s(+-)-wave Cooper Pair State in Heavily Overdoped LaFeAsO-based Superconductor: 75As-Nuclear Quadrupole Resonance
• Effect of Co Impurities on Superconductivity of FeSe0.4Te0.6 single crystals
• Superconducting coplanar microwave resonators with operating frequencies up to 50 GHz
• Superconducting fluctuations in isovalently-substituted BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$: Possible observation of multiband effects
• Doping effect of Cu and Ni impurities on the Fe-based superconductor Ba0.6K0.4Fe2As2
• Spin dynamics in electron-doped pnictide superconductors
• Vortex as a probe - suggested measurement of the order parameter structure in iron-based superconductors
• Andreev bound states in iron pnictide superconductors
• Determination of the pairing state in iron-based superconductors through neutron scattering
• Vortex dynamics and second magnetization peak in PrFeAsO${}_{0.60}$F${}_{0.12}$ superconductor
• Superconductivity of underdoped PrFeAs(O,F) investigated via point-contact spectroscopy and nuclear magnetic resonance
• Brief review on iron-based superconductors: are there clues for unconventional superconductivity?
• Microwave study of superconducting Sn films above and below percolation
• Conventional Superconductivity in Fe-Based Pnictides: the Relevance of Intra-Band Electron-Boson Scattering
• Superconducting Pb stripline resonators in parallel magnetic field and their application for microwave spectroscopy
• Green function theory of dirty two-band superconductivity
• Low-temperature thermal conductivity of BaFe2As2: Parent compound of iron-arsenide superconductors
• A Unified Description of Cuprate and Iron Arsenide Superconductors
• Pressure effects on strained FeSe0.5Te0.5 thin films
• Superfluid density in the $s_{\pm }$-wave state of clean iron-based superconductors
• Millimeter-wave study of London penetration depth temperature dependence in Ba(Fe0.926Co0.074)2As2 single crystal
• Vortex Dynamics and Dissipation Under High-amplitude Microwave Drive
• Multi-band superconductivity in LaFeAsO_{0.9}F_{0.1} single crystals probed by high-field vortex torque magnetometry
• Nodeless two-gap superconductivity in stoichiometric iron pnictide LiFeAs
• The effect of disorder on electronic Raman scattering in the superconducting state of iron pnictides
• Large Microwave Inductance of Granular Boron-Doped Diamond Superconducting Films
• Comment on "Isoelectronic Ru substitution at Fe-site in Sm(Fe${}_{1-x}$Ru${}_x$)AsO${}_{0.85}$F${}_{0.15}$ compound and its effects on structural, superconducting and normal state properties" (arXiv:1004.1978)
• Q-scan-analysis of the neutron scattering in iron-based superconductors
• Direct measurement of the temperature dependence of the magnetic penetration depth in Ba(Fe${}_{1-x}$Ni${}_x$)${}_2$As${}_2$ superconductors
• Study of Ni and Zn doped CeOFeAs: Effect on the structural transition and specific heat capacity
• Magnetic disorder and gap symmetry in optimally electron doped Sr(Fe, Co)${}_2$As${}_2$ superconductor
• Aligned crystallite powder of NdFeAsO${}_{0.86}$F${}_{0.14}$: magnetic hysteresis and penetration depth
• Effect of inelastic scattering on the nuclear magnetic relaxation rate 1/T1T in iron-based superconductors
• On the determination of the quasiparticle scattering rate in unconventional superconductors by microwave surface impedance
• Multiple gaps revealed by low temperature specific heat in the 1111-type CaFe_{0.88}Co_{0.12}AsF single crystals
• Coherence effect in a two-band superconductor: Application to iron pnictides
• A Field-directional Specific Heat Study on the Gap Structure of Overdoped Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• First-principles-based $\pm s$-wave modelling for iron-based superconductors:Studies for specific heat and nuclear magnetic relaxation rate
• Coexistence of Antiferromagnetism and Superconductivity in PrFeAsO${}_{1-\delta }$
• Gap Structure of the Overdoped Iron-Pnictide Superconductor Ba(Fe${}_{0.942}$Ni${}_{0.058}$)${}_2$As${}_2$: A Low-Temperature Specific-Heat Study