Electronic phase separation in the slightly underdoped iron pnictide superconductor Ba(1-x)K(x)Fe(2)As(2)

Abstract

Here we present a combined study of the slightly underdoped novel pnictide superconductor Ba(1-x)K(x)Fe(2)As(2) by means of X-ray powder diffraction, neutron scattering, muon spin rotation (muSR), and magnetic force microscopy (MFM). Commensurate static magnetic order sets in below Tm ~ 70 K as inferred from the emergence of the magnetic (1 0 -3) reflection in the neutron scattering data and from the observation of damped oscillations in the zero-field-muSR asymmetry. Transverse-field muSR below Tc shows a coexistence of magnetically ordered and non-magnetic states, which is also confirmed by MFM imaging. We explain such coexistence by electronic phase separation into antiferromagnetic and superconducting/normal state regions on a lateral scale of several tens of nanometers. Our findings indicate that such mesoscopic phase separation can be considered an intrinsic property of some iron pnictide superconductors.

References in corpus (28)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• Unconventional sign-reversing superconductivity in LaFeAsO_(1-x)F_x
• Complexity in Strongly Correlated Electronic Systems
• 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
• Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
• Discovery of microscopic electronic inhomogeneity in the high-Tc superconductor Bi2Sr2CaCu2O8+x
• Structural and magnetic phase diagram of CeFeAsO1-xFx and its relationship to high-temperature superconductivity
• Imaging the granular structure of high-Tc superconductivity in underdoped Bi2Sr2CaCu2O8+x
• Strong Correlations and Magnetic Frustration in the High Tc Iron Pnictides
• Antiferromagnetic Order Induced by an Applied Magnetic Field in a High-Temperature Superconductor
• Electronic liquid crystal state in the high-temperature superconductor YBCO(6.45)
• Correlated electronic structure of LaOFeAs
• A minimal two-band model for the superconducting Fe-pnictides
• Colossal Effects in Transition Metal Oxides Caused by Intrinsic Inhomogeneities
• Coexistence of the spin-density-wave and superconductivity in the (Ba,K)Fe2As2
• Theory of magnetic excitations in iron-based layered superconductors
• Imaging the Two Gaps of the High-TC Superconductor Pb-Bi2Sr2CuO6+x
• Electronic Origin of the Inhomogeneous Pairing Interaction in the High-Tc Superconductor Bi2Sr2CaCu2O8+d
• Momentum dependence of the superconducting gap in Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$
• (pi,pi)-electronic order in iron arsenide superconductors
• Low energy spin waves and magnetic interactions in SrFe${}_2$As${}_2$
• Muon spin relaxation studies of incommensurate magnetism and superconductivity in stage-4 La${}_2$CuO${}_{4.11}$ and La${}_{1.88}$Sr${}_{0.12}$CuO${}_4$
• Tuning competing orders in La2-xSrxCuO4 cuprate superconductors by the application of an external magnetic field
• Theory of the Magnetic Moment in Iron Pnictides
• Coexistence of magnetic fluctuations and superconductivity in the pnictide high temperature superconductor SmFeAsO${}_{1-x}$F${}_x$ measured by muon spin rotation
• Neutron diffraction on antiferromagnetic ordering in single-crystal BaFe2As2
• Muon spin relaxation studies of magnetic order and superfluid density in antiferromagnetic NdOFeAs, BaFe2As2 and superconducting (Ba,K)Fe2As2

Cited by in corpus (122)

• Superconductivity in Iron Compounds
• Magnetism and its microscopic origin in iron-based high-temperature superconductors
• Magnetism in Fe-based superconductors
• Critical change in the Fermi surface of iron arsenic superconductors at the onset of superconductivity
• Nanoscale phase separation in the iron chalcogenide superconductor K0.8Fe1.6Se2 as seen via scanning nanofocused x-ray diffraction
• Probing multiband superconductivity by point-contact spectroscopy
• Iron based superconductors: magnetism, superconductivity and electronic structure
• Iron based high transition temperature superconductors
• Competing order and nature of the pairing state in the iron pnictides
• Unconventional pairing in the iron arsenide superconductors
• Pressure Induced Static Magnetic Order in Superconducting FeSe_1-x
• Phase Diagram of Ba1-xKxFe2As2
• Coexistence of Magnetism and Superconductivity in the Iron-based Compound Cs_0.8(FeSe_0.98)_2
• Superconductivity and spin-density-waves in multi-band metals
• Atomic coexistence of superconductivity and incommensurate magnetic order in the Ba(Fe1-xCox)2As2 pnictide
• Coexistence of Superconductivity and Magnetism in FeSe_1-x under Pressure
• Coexistence of incommensurate magnetism and superconductivity in Fe_{1+y}Se_xTe_{1-x}
• Momentum-resolved superconducting gap in the bulk of Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ from combined ARPES and $\mu$SR measurements
• Symmetry of spin excitation spectra in the tetragonal paramagnetic and superconducting phases of 122-ferropnictides
• EuFe${}_2$As${}_2$ under high pressure: an antiferromagnetic bulk superconductor
• Two-gap superconductivity in Ba_1-xK_xFe_2As_2: A complementary study of the magnetic penetration depth by \muSR and ARPES
• Magnetic Resonant Mode in the Low-Energy Spin-Excitation Spectrum of Superconducting Rb2Fe4Se5 Single Crystals
• Microscopic co-existence of superconductivity and magnetism in Ba1-xKxFe2As2
• Magnetism, Superconductivity and Stoichiometry in Single Crystals of Fe1+y(Te1-xSx)z
• Directional point-contact Andreev-reflection spectroscopy of Fe-based superconductors: Fermi surface topology, gap symmetry, and electron-boson interaction
• Homogeneous vs. inhomogeneous coexistence of magnetic order and superconductivity probed by NMR in Co and K doped iron pnictides
• Competition of magnetism and superconductivity in underdoped (Ba1-xKx)Fe2As2
• Magnetoelastic Coupling in the Phase Diagram of Ba1-xKxFe2As2
• Spin fluctuations in iron pnictides and chalcogenides: From antiferromagnetism to superconductivity
• Evidence of local structural inhomogeneity in FeSe(1-x)Te(x) from extended x-ray absorption fine structure
• Optical properties of the iron-arsenic superconductor BaFe1.85Co0.15As2
• Nanoscale electronic order in iron pnictides
• Weak superconducting pairing and a single isotropic energy gap in stoichiometric LiFeAs
• Phonon anomalies in pure and underdoped R{1-x}K{x}Fe{2}As{2} (R = Ba, Sr) investigated by Raman light scattering
• Nanoscale layering of antiferromagnetic and superconducting phases in Rb2Fe4Se5
• Flux-dynamics associated with the Second Magnetisation Peak in iron-pnictide Ba_{1-x}K_xFe_2As_2
• Superconductivity, magnetism and crystal chemistry of Ba1-xKxFe2As2
• 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${}_2$}
• Orbital and spin effects for the upper critical field in As deficient disordered Fe pnictide superconductors
• Surface Geometric and Electronic Structure of BaFe2As2(001)
• Point contact Andreev reflection spectroscopy of superconducting energy gaps in 122-type family of iron pnictides
• A perspective on pnictide superconductors
• Superconducting properties of single-crystalline A_{x}Fe_{2-y}Se_{2} (A=Rb, K) studied using muon spin spectroscopy
• Coexistence of superconductivity and a spin density wave in pnictides: Gap symmetry and nodal lines
• Chemical Pressure and Physical Pressure in BaFe_2(As_{1-x}P_{x})_2
• Quasiparticle relaxation dynamics in spin-density-wave and superconducting SmFeAsO_{1-x}F_{x} single crystals
• 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${}_2$ ($0.22\le x\le 1$)
• Spontaneous formation of a superconducting and antiferromagnetic hybrid state in SrFe2As2 under high pressure
• Microscopic coexistence of antiferromagnetic order and superconductivity in Ba${}_{0.77}$K${}_{0.23}$Fe${}_2$As${}_2$
• Superconductivity and its mechanism in an ab initio model for electron-doped LaFeAsO
• Electronic phase separation: recent progress in the old problem
• Direct observation of local K variation and its correlation to electronic inhomogeneity in (Ba1-xKx)Fe2As2 Pnictide
• Pseudogap in underdoped Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ as seen via optical conductivity
• Possible realization of an antiferromagnetic Griffiths phase in Ba[Fe(1-x)Mn(x)](2)As(2)
• Muon spin rotation study of magnetism and superconductivity in Ba(Fe1-xCox)2As2 single crystals
• Hydrostatic-pressure tuning of magnetic, nonmagnetic and superconducting states in annealed Ca(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Symmetry and disorder of the vitreous vortex lattice in an overdoped BaFe_{2-x}Co_xAs_2 superconductor: Indication for strong single-vortex pinning
• Muon spin rotation study of magnetism and superconductivity in BaFe2-xCoxAs2 and Pr1-xSrxFeAsO
• Thermodynamic phase diagram and phase competition in BaFe2(As1-xPx)2 studied by thermal expansion
• Frustration-induced nanometre-scale inhomogeneity in a triangular antiferromagnet
• Synthesis and physical properties of $\mathbf{La}{\mathbf{O}}_{1-\mathbf{x}}{\mathbf{F}}_{\mathbf{x}}\mathbf{FeAs}$
• Dopant Clustering, Electronic Inhomogeneity, and Vortex Pinning in Iron-Based Superconductors
• Suppression of the structural phase transition and lattice softening in slightly underdoped Ba(1-x)K(x)Fe2As2 with electronic phase separation
• Optical conductivity of iron-based superconductors
• Tuning of competing magnetic and superconducting phase volumes in LaFeAsO$_0.945F_0.055 by hydrostatic pressure
• Critical current and vortex dynamics in single crystals of Ca(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Magnetic and superconducting transitions in Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ studied by specific heat
• Distinct high-T transitions in underdoped Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$
• Superconducting fluctuations in the reversible magnetization of the iron-pnictide $B{a}_{1-x}{K}_{x}F{e}_{2}A{s}_2$
• Electronic phase separation in iron pnictides
• Quasiparticle interference from magnetic impurities
• Phase separation of antiferromagnetic ground states in systems with imperfect nesting
• Phase separation in a lattice model of a superconductor with pair hopping
• Effective carrier type and field-dependence of the reduced-Tc superconducting state in SrFe(2-x)Ni(x)As2
• Point-contact spectroscopic studies on normal and superconducting AFe_2As_2-type iron-pnictide single crystals
• Coexistence of Dirac-Cone States and Superconductivity in Iron Pnictide Ba(Fe${}_{1-x}$Ru${}_x$As)${}_2$
• Microscopic Study of the Superconducting State of the Iron Pnictide RbFe_2As_2
• Self-energy effects and electron-phonon coupling in Fe-As superconductors
• Fermi surface of Ba{1-x}KxFe2As2 as probed by angle-resolved photoemission
• Pseudogap-less high T${}_c$ superconductivity in BaCo${}_x$Fe${}_{2-x}$As${}_2$
• Angle-resolved photoemission spectroscopy study on iron-based superconductors
• Superconductivity mediated by the antiferromagnetic spin-wave in chalcogenide iron-base superconductors
• The magnetic field induced phase separation in a model of a superconductor with local electron pairing
• Magnetic inhomogeneity on a triangular lattice: the magnetic-exchange versus the elastic energy and the role of disorder
• A view from inside iron-based superconductors
• Probing the Ground State Properties of Iron-based Superconducting Pnictides and Related Systems by Muon-Spin Spectroscopy
• Doping dependent evolution of magnetism and superconductivity in Eu1-xKxFe2As2 (x = 0-1) and temperature dependence of lower critical field Hc1
• Muon spin rotation and infrared spectroscopy study of magnetism and superconductivity in Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$
• Transport properties and the anisotropy of Ba_{1-x}K_xFe_2As_2 single crystals in normal and superconducting states
• Some properties of the model of a superconductor with pair hopping and magnetic interactions at half-filling
• Ru-doping on iron based pnictides: the "unfolded" dominant role of structural effects for superconductivity
• Phase separation of superconducting phases in the Penson-Kolb-Hubbard model
• Superconducting gap structure in ambient-pressure-grown $\mathrm{La}{\mathrm{O}}_{0.5}{\mathrm{F}}_{0.5}\mathrm{Bi}{\mathrm{S}}_2$
• Magnetic field effects in electron systems with imperfect nesting
• Orbital-Selective Superconductivity and the Effect of Lattice Distortion in Iron-Based Superconductors
• Macroscopic Length Correlations in Non-Equilibrium Systems and Their Possible Realizatons
• Spatial Inhomogeneity in RFeAsO1-xFx (R =Pr, Nd) Determined from Rare Earth Crystal Field Excitations
• New insight into the physics of iron pnictides from optical and penetration depth data
• Electronic phase separation in iron selenide (Li, Fe)OHFeSe superconductor system
• Homogeneous coexistence of SDW and SC states in CaFe(1-x)Co(x)AsF studied by nuclear magnetic resonance
• Microscopic coexistence of a two-component incommensurate spin density wave with superconductivity in underdoped NaFe${}_{0.983}$Co${}_{0.017}$As
• Lattice anomalies in the FeAs${}_4$ tetrahedra of the NdFeAsO${}_{0.85}$ superconductor that disappear at T${}_{\mathrm{c}}$
• Competition of spatially inhomogeneous states in antiferromagnetic Hubbard model
• Electronic Behavior of Superconducting SmFeAsO0.75
• 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
• Competing superconducting and magnetic order parameters and field-induced magnetism in electron doped Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Magnetically polarized Ir dopant atoms in superconducting Ba(Fe${}_{1-x}$Ir${}_x$)${}_2$As${}_2$
• Atomistic origin of metal versus charge-density-wave phase separation in indium atomic wires on Si(111)
• Absence of large nanoscale electronic inhomogeneities in the Ba(Fe1-xCox)2As2 pnictide
• Effective three-band structure in Fe-based superconductors
• Ultrafast quasiparticle dynamics in superconducting iron pnictide CaFe1.89Co0.11As2
• Anomalous local magnetic field distribution and strong pinning in CaFe1.94Co0.06As2 single crystals
• Temperature dependent As K-edge EXAFS studies of LaFe1-xCoxAsO (x = 0.0 and 0.11) single crystals
• Coupled Magnetic and Superconducting Transitions in Sr${}_2$VO${}_3$FeAs Under Pressure
• A neutron scattering study of the under-doped Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$, x=0.09 and 0.17 self-flux grown single crystals and the universality of the tricritical point
• Weakening of the spin density wave gap at low temperatures in SrFe${}_2$As${}_2$ single crystals
• Phonon-assisted phase separation in strongly correlated systems
• Electronic inhomogeneities in the superconducting phase of CaFe1.96Ni0.04As2 single crystals
• Cooperative order in the weakly magnetic domain of LaFeAsO${}_{1-x}$F${}_x$ near the doping phase boundary
• Disorder correction to the Néel temperature of ruthenium-doped BaFe${}_2$As${}_2$: Theoretical analysis
• FFLO oscillations and magnetic domains in the Hubbard model with off-diagonal Coulomb repulsion
• Self-organized electronic superlattices in layered materials