Quantum oscillations in the parent magnetic phase of an iron arsenide high temperature superconductor

Abstract

We report quantum oscillation measurements in SrFe2As2 - which is an antiferromagnetic parent of the iron-arsenide family of superconductors - known to become superconducting under doping and the application of pressure. The magnetic field and temperature dependences of the oscillations between 20 and 55 T in the liquid helium temperature range suggest that the electronic excitations are those of a Fermi liquid. We show that the observed Fermi surface comprising small pockets is consistent with the formation of a spin-density wave. Our measurements thus demonstrate that high Tc superconductivity can occur on doping or pressurizing a conventional metallic spin-density wave state.

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• Nodal Spin Density Wave and band topology of the FeAs based materials
• High - Temperature Superconductivity in Iron Based Layered Compounds
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• Unconventional electronic reconstruction in undoped (Ba,Sr)Fe${}_2$As${}_2$ across the spin density wave transition
• Electronic Structure of Fe-Based Superconductors
• On the multi-orbital band structure and itinerant magnetism of iron-based superconductors
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• Psuedo-isotropic upper critical field in cobalt-doped SrFe2As2 epitaxial films
• Quantum oscillations in the parent pnictide BaFe${}_2$As${}_2$ : itinerant electrons in the reconstructed state
• Muon spin relaxation studies of magnetic order and superfluid density in antiferromagnetic NdOFeAs, BaFe2As2 and superconducting (Ba,K)Fe2As2
• Itinerant Spin Excitations in SrFe2As2 Measured by Inelastic Neutron Scattering
• Topological and Transport Properties of Dirac Fermions in Antiferromagnetic Metallic Phase of Iron-Based Superconductors
• Three- to Two-Dimensional Transition of the Electronic Structure in CaFe2As2 - parent compound for an iron arsenic high temperature superconductor
• 77Se NMR Investigation of the K(x)Fe(2-y)Se(2) High Tc Superconductor (Tc=33K)
• Fermi surface of SrFe${}_2$P${}_2$ determined by de Haas-van Alphen effect
• Correlation effects in the iron pnictides
• Spin excitations in the excitonic spin-density-wave state of the iron pnictides
• Electronic structure, disconnected Fermi surfaces and antiferromagnetism in the layered pnictide superconductor Na${}_x$Ba${}_{1-x}$Ti${}_2$Sb${}_2$O
• Electron-phonon coupling and charge gap in spin-density-wave iron-pnictides from quasiparticle relaxation dynamics
• Excitonic spin density wave state in iron pnictides
• Local moments and symmetry breaking in metallic PrMnSbO
• Fermi-Surface Reconstruction and Complex Phase Equilibria in CaFe${}_2$As${}_2$
• Magnetic order in orbital models of the iron pnictides
• Universal pair-breaking in transition metal-substituted iron-pnictide superconductors
• The magnetic moment enigma in Fe-based high temperature superconductors
• Quasiparticle states around a nonmagnetic impurity in electron-doped iron-based superconductors with spin-density-wave order
• Pseudogap-less high T${}_c$ superconductivity in BaCo${}_x$Fe${}_{2-x}$As${}_2$
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• Anisotropic Superconducting Properties of Optimally Doped BaFe${}_2$(As${}_{0.65}$P${}_{0.35}$)${}_2$ under Pressure
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• Experimental determination of the microscopic origin of magnetism in parent iron pnictides
• Fermi-surface topology of the iron pnictide LaFe${}_2$P${}_2$
• Magnetic excitations in ferro-pnictide materials controlled by a quantum critical point into hidden order
• Effect of Fermi Surface Topology on Inter-Layer Magnetoresistance in Layered Multiband Systems: Application to LaFeAsO1-xFx
• Electronic structure, spin excitations, and orbital ordering in a three-orbital model for iron pnictides
• Effect of inelastic scattering on the nuclear magnetic relaxation rate 1/T1T in iron-based superconductors
• Interband scattering- and nematicity-induced quantum oscillation frequency in FeSe
• Localized and itinerant dichotomy of electrons in Ba(Fe,Co)2As2
• Dynamical magnetic breakdown and quantum oscillations from hot spot scattering