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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• Evolution of the optical spectrum with doping in iron pnictides Ba(Fe1-xCox)2As2
• On the multi-orbital band structure and itinerant magnetism of iron-based superconductors
• Many-body effects in iron pnictides and chalcogenides -- non-local vs dynamic origin of effective masses
• Neutron and ARPES Constraints on the Couplings of the Multiorbital Hubbard Model for the Pnictides
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• Orbital-weight redistribution triggered by spin order in the pnictides
• Strong correlation and massive spectral-weight redistribution induced spin density wave in a-Fe1.06Te
• Surface and bulk electronic structures of LaOFeAs studied by angle resolved photoemission spectroscopy
• Itinerant Nature of U 5f States in Uranium Mononitride UN Revealed by Angle Resolved Photoelectron Spectroscopy
• Detailed band structure of twinned and detwinned BaFe${}_2$As${}_2$ studied with angle-resolved photoemission spectroscopy
• Band structure of silicene on the zirconium diboride (0001) thin film surface - convergence of experiment and calculations in the one-Si-atom Brillouin zone
• Magnetic order in orbital models of the iron pnictides
• Electronic structure of BaNi${}_2$As${}_2$
• Analysis of spin density wave conductivity spectra of iron pnictides in the framework of density functional theory
• Quasiparticle states around a nonmagnetic impurity in electron-doped iron-based superconductors with spin-density-wave order
• Mott insulating phase and coherent-incoherent crossover across magnetic phase transition in 2D antiferromagnetic CrSBr
• Suppression of backward scattering of Dirac fermions in iron pnictides Ba(Fe${}_{1-x}$Ru${}_x$As)${}_2$
• Optical and photoemission investigation of structural and magnetic transitions in the iron-based superconductor Sr${}_{0.67}$Na${}_{0.33}$Fe${}_2$As${}_2$
• Uniaxial "nematic-like" electronic structure and Fermi surface of untwinned CaFe2As2
• Revealing the intrinsic superconducting gap anisotropy in surface-neutralized BaFe${}_2$(As${}_{0.7}$P${}_{0.3}$)${}_2$
• Electronic structure, spin excitations, and orbital ordering in a three-orbital model for iron pnictides
• The role of magnetic excitations in magnetoresistance and Hall effect of slightly TM-substituted BaFe${}_2$As${}_2$ compounds (TM = Mn, Cu, Ni)
• Hund's coupling and electronic anisotropy in the spin-density wave state of iron pnictides