Electron-Hole Asymmetry in Superconductivity of Pnictides Originated from the Observed Rigid Chemical Potential Shift

Abstract

We have performed a systematic photoemission study of the chemical potential shift as a function of carrier doping in a pnictide system based on BaFe${}_2$As${}_2$. The experimentally determined chemical potential shift is consistent with the prediction of a rigid band shift picture by the renormalized first-principle band calculations. This leads to an electron-hole asymmetry (EHA) in the Fermi surface (FS) nesting condition due to different effective masses for different FS sheets, which can be calculated from the Lindhard function of susceptibility. This built-in EHA from the band structure, which matches well with observed asymmetric superconducting domes in the phase diagram, strongly supports FS near-nesting driven superconductivity in the iron pnictides.

4 pages, 4 figures

References in corpus (14)

• Unconventional pairing originating from disconnected Fermi surfaces in superconducting LaFeAsO${}_{1-x}$F${}_x$}
• Observation of Fermi-surface-dependent nodeless superconducting gaps in Ba0.6K0.4Fe2As2
• Funtional Renormalization Group Study of the Pairing Symmetry and Pairing Mechanism of the FeAs Based High Temperature Superconductors
• Superconductivity and Crystal Structures of (Ba1-xKx)Fe2As2 (x = 0 - 1)
• Pairing Symmetry in a Two-Orbital Exchange Coupling Model of Oxypnictides
• Multiband magnetism and superconductivity in Fe-based compounds
• Superconducting gap symmetry of Ba0.6K0.4Fe2As2 studied by angle-resolved photoemission spectroscopy
• Transport and anisotropy in single-crystalline SrFe${}_2$As${}_2$ and $A_{0.6}$K${}_{0.4}$Fe${}_2$As${}_2$ ($A$ = Sr, Ba) superconductors
• Where Are the Extra d Electrons in Transition-Metal Substituted Fe Pnictides?
• Electronic structure of heavily electron-doped BaFe${}_{1.7}$Co${}_{0.3}$As${}_2$ studied by angle-resolved photoemission
• Observation of an Orbital Selective Electron-Mode Coupling in Fe-Based High-$T_c$ Superconductors
• Enhanced Fermi surface nesting in superconducting BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$ revealed by de Haas-van Alphen effect
• Electron-hole Asymmetry and Quantum Critical Point in Hole-doped BaFe${}_2$As${}_2$
• A high resolution, hard X-ray photoemission investigation of BaFe${}_2$As${}_2$: moderate influence of the surface and evidence for a low degree of Fe 3d - As 4p hybridization of the near-E${}_F$ electronic states

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• Electronic band structure of BaCo${}_2$As${}_2$: a fully-doped ferropnictide with reduced electronic correlations
• ARPES measurements of the superconducting gap of Fe-based superconductors and their implications to the pairing mechanism
• Effects of Ru Substitution on Dimensionality and Electron Correlations in Ba(Fe_{1-x}Ru_x)_2As_2
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• Magnetic neutron scattering studies on the Fe-based superconductor system Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$
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• 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
• Enhanced low-energy magnetic excitations evidencing the Cu-induced localization in an Fe-based superconductor Fe${}_{0.98}$Te${}_{0.5}$Se${}_{0.5}$
• Fluctuating magnetism of Co- and Cu-doped NaFeAs
• Electronic properties and surface states of RbNi${}_2$Se${}_2$
• Emergence of the minority hole with high mobility on the electrical transport in the Fe-pnictides Ba(Fe${}_{1-x}$Mn${}_x$As)${}_2$
• Observation of the Dirac Dispersions in Co-doped CaFe2As2