Unconventional electronic reconstruction in undoped (Ba,Sr)Fe${}_2$As${}_2$ across the spin density wave transition

Abstract

Through a systematic high resolution angle-resolved photoemission study of the iron pnictide compounds (Ba,Sr)Fe${}_2$As${}_2$, we show that the electronic structures of these compounds are significantly reconstructed across the spin density wave ordering, which cannot be described by a simple folding scenario of conventional density wave ordering. Moreover, we find that LDA calculations with an incorporated suppressed magnetic moment of 0.5${\mu }_{\text{B}}$ can match well the details in the reconstructed electronic structure, suggesting that the nature of magnetism in the pnictides is more itinerant than local, while the origin of suppressed magnetic moment remains an important issue for future investigations.

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• Angle-resolved photoemission study of the role of nesting and orbital orderings in the antiferromagnetic phase of BaFe2As2
• Magnetic order in orbital models of the iron pnictides
• Analysis of spin density wave conductivity spectra of iron pnictides in the framework of density functional theory
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• Modeling Antiferromagnetic Phase in Iron Pnictides: Weakly Ordered State
• Spin-Density-Wave and Asymmetry of Coherence Peaks in iron-Pnictide Superconductors from a two-orbital model
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• Building a Stückelberg Portal
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• Ru-doping on iron based pnictides: the "unfolded" dominant role of structural effects for superconductivity
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• The double life of electrons in magnetic iron pnictides, as revealed by NMR
• Mott insulating phase and coherent-incoherent crossover across magnetic phase transition in 2D antiferromagnetic CrSBr
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• Doping dependence of antiferromagnetism in models of the pnictides
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