Direct observation of local K variation and its correlation to electronic inhomogeneity in (Ba1-xKx)Fe2As2 Pnictide

Abstract

Local fluctuations in the distribution of dopant atoms are a suspected cause of nanoscale electronic disorder or phase separation observed within the pnictide superconductors. Atom probe tomography results present the first direct observations of dopant nano-clustering in a K-doped 122-phase pnictides. First-principles calculations suggest the coexistence of static magnetism and superconductivity on a lattice parameter length scale over a large range of doping concentrations. Collectively, our results provide evidence for a mixed scenario of phase coexistence and phase separation originating from variation of dopant atom experiments distroibutions.

4 pages, 4 figures and 1 table, accepted by Physical Review Letter 2011

References in corpus (25)

• Discovery of microscopic electronic inhomogeneity in the high-Tc superconductor Bi2Sr2CaCu2O8+x
• Magnetic order in BaFe2As2, the parent compound of the FeAs based superconductors in a new structural family
• Structural and magnetic phase diagram of CeFeAsO1-xFx and its relationship to high-temperature superconductivity
• The electronic phase diagram of the LaO1-xFxFeAs superconductor
• Superconductivity and Crystal Structures of (Ba1-xKx)Fe2As2 (x = 0 - 1)
• Coexistence of the spin-density-wave and superconductivity in the (Ba,K)Fe2As2
• Scanning Tunneling Spectroscopy and Vortex Imaging in the Iron-Pnictide Superconductor BaFe${}_{1.8}$Co${}_{0.2}$As${}_2$
• Electronic phase separation in the slightly underdoped iron pnictide superconductor Ba(1-x)K(x)Fe(2)As(2)
• Spin susceptibility, phase diagram, and quantum criticality in the electron-doped high Tc Superconductor Ba[Fe(1-x)Co(x)]2As2
• Atomic coexistence of superconductivity and incommensurate magnetic order in the Ba(Fe1-xCox)2As2 pnictide
• Very strong intrinsic supercurrent carrying ability and vortex avalanches in (Ba,K)Fe2As2 superconducting single crystals
• 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${}_2$
• Interplay between magnetism and superconductivity in Fe-pnictides
• Neutron diffraction on antiferromagnetic ordering in single-crystal BaFe2As2
• Homogeneous vs. inhomogeneous coexistence of magnetic order and superconductivity probed by NMR in Co and K doped iron pnictides
• 75As NMR Study of Hole-Doped Superconductor Ba1-xKxFe2As2 (Tc = 38K)
• Muon spin relaxation studies of magnetic order and superfluid density in antiferromagnetic NdOFeAs, BaFe2As2 and superconducting (Ba,K)Fe2As2
• Competition of magnetism and superconductivity in underdoped (Ba1-xKx)Fe2As2
• Nanoscale superconducting gap variations, strong coupling signatures and lack of phase separation in optimally doped BaFe1.86Co0.14As2
• Superconductivity, magnetism and crystal chemistry of Ba1-xKxFe2As2
• Coexistence and competition of magnetism and superconductivity on the nanometer scale in underdoped BaFe1.89Co0.11As2
• A doping dependent specific heat study of the superconducting gap in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Suppression of the structural phase transition and lattice softening in slightly underdoped Ba(1-x)K(x)Fe2As2 with electronic phase separation
• Distinct high-T transitions in underdoped Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$
• Absence of large nanoscale electronic inhomogeneities in the Ba(Fe1-xCox)2As2 pnictide

Cited by in corpus (15)

• Progress in wire fabrication of iron-based superconductors
• Atom probe microscopy investigation of Mg site occupancy within δ precipitates in an Al Mg Li alloy
• 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${}_2$}
• 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${}_2$ ($0.22\le x\le 1$)
• Muon spin rotation study of magnetism and superconductivity in Ba(Fe1-xCox)2As2 single crystals
• On the roles of graphene oxide doping for enhanced supercurrent in MgB2 based superconductors
• Dopant Clustering, Electronic Inhomogeneity, and Vortex Pinning in Iron-Based Superconductors
• s+is superconductivity with incipient bands: doping dependence and STM signatures
• On infrared pseudogap in cuprate and pnictide high-temperature superconductors
• Superconductivity mediated by the antiferromagnetic spin-wave in chalcogenide iron-base superconductors
• Chemical stability and superconductivity in Ag-sheathed CaKFe4As4 superconducting tapes
• Effects of charge inhomogeneities on elementary excitations in La_{2-x}Sr_xCuO_4
• Atomic-scale 3D imaging of individual dopant atoms in a complex oxide
• 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
• Ab initio study of the influence of nanoscale doping inhomogeneities in the phase separated state of La${}_{1-x}$Ca${}_x$MnO${}_3$