Electronic structure of heavily electron-doped BaFe${}_{1.7}$Co${}_{0.3}$As${}_2$ studied by angle-resolved photoemission

Abstract

We have performed high-resolution angle-resolved photoemission spectroscopy on heavily electron-doped non-superconducting (SC) BaFe${}_{1.7}$Co${}_{0.3}$As${}_2$. We find that the two hole Fermi surface pockets at the zone center observed in the hole-doped superconducting Ba${}_{0.6}$K${}_{0.4}$Fe${}_2$As${}_2$ are absent or very small in this compound, while the two electron pockets at the M point significantly expand due to electron doping by the Co substitution. Comparison of the Fermi surface between non-SC and SC samples indicates that the coexistence of hole and electron pockets connected via the antiferromagnetic wave vector is essential in realizing the mechanism of superconductivity in the iron-based superconductors.

5 pages, 4 figures

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Cited by in corpus (31)

• High-temperature superconductivity in iron-based materials
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• Importance of Fermi surface topology for high temperature superconductivity in electron-doped iron arsenic superconductors
• Electronic Structure of the BaFe${}_2$As${}_2$ Family of Iron Pnictides
• Dependence of carrier doping on the impurity potential in transition-metal-substituted FeAs-based superconductors
• Optical properties of the iron-arsenic superconductor BaFe1.85Co0.15As2
• Electron-Hole Asymmetry in Superconductivity of Pnictides Originated from the Observed Rigid Chemical Potential Shift
• Effect of 3d-doping on the electronic structure of BaFe2As2
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• The anomaly Cu doping effects on LiFeAs superconductors
• NMR investigation of spin correlations in BaCo2As2
• Doping-Dependent and Orbital-Dependent Band Renormalization in Ba(Fe_1-xCo_x)_2As_2 Superconductors
• Structural Analysis on Iron-Based Superconductor Pr1111 System with Oxygen Deficiency and Flourine Substitution
• Proposal to determine the Fermi-surface topology of a doped iron-based superconductor using bulk-sensitive Fourier-transform Compton scattering
• The effect of spin fluctuations on the electronic structure in iron based superconductors
• Evolution of quasiparticle states with and without a Zn-impurity in doped 122 iron pnictides
• Non-rigid band shift and non-monotonic electronic structure changes upon doping in the normal state of the pnictide high temperature superconductor Ba2(Fe1-xCox)2As2
• Effect of electron doping in FeTe${}_{1-y}$Se${}_y$ realized by Co and Ni substitution
• Resistivity in Co-doped Ba-122: comparison of thin films and single crystals
• Fermi surface evolution and checker-board block-spin antiferromagnetism in $A_x$Fe${}_{2-y}$Se${}_2$
• Effect of transition-metal substitution in iron-based superconductors
• Anomalous Superconducting-Gap Structure of Slightly Overdoped Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Emergence of the minority hole with high mobility on the electrical transport in the Fe-pnictides Ba(Fe${}_{1-x}$Mn${}_x$As)${}_2$
• Robust $s_{\pm }$-wave superconductivity against multi-impurity in iron-based superconductors
• Competing ferromagnetic superconducting states in europium-based iron pnictides
• Zero Energy Bound States on Nano Atomic Line Defect in Iron-based High Temperature Superconductors