Orbital character variation of the Fermi surface and doping dependent changes of the dimensionality in BaFe2-xCoxAs2 from angle-resolved photoemission spectroscopy

Abstract

From a combination of high resolution angle-resolved photoemission spectroscopy and density functional calculations, we show that BaFe2As2 possesses essentially two-dimensional electronic states, with a strong change of orbital character of two of the Gamma-centered Fermi surfaces as a function of kz. Upon Co doping, the electronic states in the vicinity of the Fermi level take on increasingly three-dimensional character. Both the orbital variation with kz and the more three-dimensional nature of the doped compounds have important consequences for the nesting conditions and thus possibly also for the appearance of antiferromagnetic and superconducting phases.

5 pages, 4 figures

References in corpus (20)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• LaFeAsO${}_{1-x}$F${}_x$: A low carrier density superconductor near itinerant magnetism
• Magnetic order in BaFe2As2, the parent compound of the FeAs based superconductors in a new structural family
• Near-degeneracy of several pairing channels in multiorbital models for the Fe-pnictides
• Nearly Isotropic superconductivity in (Ba,K)Fe2As2
• Determination of the phase diagram of the electron doped superconductor Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Electronic Structure and Doping in BaFe${}_2$As${}_2$ and LiFeAs: Density Functional Calculations
• Anisotropy in the electrical resistivity and susceptibility of superconducting BaFe${}_2$As${}_2$ single crystals
• Iron-based layered superconductor LaO${}_{1-x}$F${}_x$FeAs: an antiferromagnetic semimetal
• (pi,pi)-electronic order in iron arsenide superconductors
• Anisotropy of the Optimally-Doped Iron Pnictide Superconductor Ba(Fe0.926Co0.074)2As2
• Unconventional electronic reconstruction in undoped (Ba,Sr)Fe${}_2$As${}_2$ across the spin density wave transition
• Electronic Structure of the BaFe${}_2$As${}_2$ Family of Iron Pnictides
• Electronic structure of heavily electron-doped BaFe${}_{1.7}$Co${}_{0.3}$As${}_2$ studied by angle-resolved photoemission
• Nesting between hole and electron pockets in Ba(Fe1-xCox)2As2 (x=0-0.3) observed with angle-resolved photoemission
• Three- to Two-Dimensional Transition of the Electronic Structure in CaFe2As2 - parent compound for an iron arsenic high temperature superconductor
• Nanoscale superconducting gap variations, strong coupling signatures and lack of phase separation in optimally doped BaFe1.86Co0.14As2
• Three-dimensional electronic structure of superconducting iron pnictides observed by angle-resolved photoemission spectroscopy
• Microscopic origin of pressure-induced phase transitions in iron-pnictide $AF{e}_{2}A{s}_2$ superconductors: an {ab initio} molecular-dynamics study
• Droplet-like Fermi surfaces in the anti-ferromagnetic phase of EuFe${}_2$As${}_2$, an Fe-pnictide superconductor parent compound

Cited by in corpus (46)

• The Puzzle of High Temperature Superconductivity in Layered Iron Pnictides and Chalcogenides
• Iron based superconductors: magnetism, superconductivity and electronic structure
• Many-body effects in iron pnictides and chalcogenides -- non-local vs dynamic origin of effective masses
• Impact of the 2 Fe unit cell on the electronic structure measured by ARPES in iron pnictides
• Large temperature dependence of the number of carriers in Co-doped BaFe2As2
• Significant reduction of electronic correlations upon isovalent Ru substitution of BaFe2As2
• What controls the phase diagram and superconductivity in Ru substituted BaFe${}_2$As${}_2$?
• Enhanced Fermi surface nesting in superconducting BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$ revealed by de Haas-van Alphen effect
• Coherent excitations and electron phonon coupling in Ba/EuFe_2As_2 compounds investigated by femtosecond time- and angle-resolved photoemission spectroscopy
• Shape resonance for the anisotropic superconducting gaps near a Lifshitz transition: the effect of electron hopping between layers
• Upper critical field of KFe2As2 under pressure: A test for the change in the superconducting gap structure
• ARPES experiment in fermiology of quasi-2D metals (Review Article)
• Detailed band structure of twinned and detwinned BaFe${}_2$As${}_2$ studied with angle-resolved photoemission spectroscopy
• Spectral properties of transition metal pnictides and chalcogenides: angle-resolved photoemission spectroscopy and dynamical mean field theory
• Dissimilarities between the electronic structure of chemically doped and chemically pressurized iron pnictides from an angle-resolved photoemission spectroscopy study
• Nonequilibrium Quasiparticle Relaxation Dynamics in Single Crystals of Hole and Electron doped BaFe${}_2$As${}_2$
• Electronic Structure Studies of FeSi: A Chiral Topological System
• Analysis of spin density wave conductivity spectra of iron pnictides in the framework of density functional theory
• Hall-plot of the phase diagram for Ba(Fe1-xCox)2As2
• Non-Fermi-liquid scattering rates and anomalous band dispersion in ferropnictides
• Electronic phase diagram of disordered Co doped BaFe2As2
• Strong Coupling of the Iron-Quadrupole and Anion-Dipole Polarizations in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Electronic structure of single-crystalline Sr(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ probed by x-ray absorption spectroscopy: Evidence for isovalent substitution of Fe${}^{2+}$ by Co${}^{2+}$
• Experimental evidence for the importance of Hund's exchange interaction for the incoherence of the charge carriers in iron-based superconductors
• Orbital Symmetry of Ba(Fe1-xCox)2As2 Superconductors Probed with X-ray Absorption Spectroscopy
• Upper critical field anisotropy in BaFe2-xCoxAs2 single crystals synthesized without flux
• A weak-coupling superconductivity in the electron doped NaFe${}_{0.95}$Co${}_{0.05}$As is revealed by ARPES
• Observation of a remarkable reduction of correlation effects in BaCr2As2 by ARPES
• Transport properties of 3D extended s-wave states in Fe-based superconductors
• Doping-Dependent and Orbital-Dependent Band Renormalization in Ba(Fe_1-xCo_x)_2As_2 Superconductors
• Influence of Lifshitz transitions and correlation effects on the scattering rates of the charge carriers in iron-based superconductors
• Orbital localization and the role of the Fe and As $4p$ orbitals in BaFe${}_2$As${}_2$ probed by XANES
• Transmittance and reflectance measurements at terahertz frequencies on a superconducting BaFe_{1.84}Co_{0.16}As_2 ultrathin film: an analysis of the optical gaps in the Co-doped BaFe_2As_2 pnictide
• Electronic structure and ultrafast dynamics of FeAs-based superconductors by angle- and time-resolved photoemission spectroscopy
• A flat band at the chemical potential of a Fe1.03Te0.94S0.06 superconductor observed by angle-resolved photoemission spectroscopy
• Effect of impurity substitution on band structure and mass renormalization of the correlated FeTe${}_{0.5}$Se${}_{0.5}$ superconductor
• Fermi-surface reconstruction involving two Van Hove singularities across the antiferromagnetic transition in BaFe2As2
• Importance of Itinerancy and Quantum Fluctuations for the Magnetism in Iron Pnictides
• Incoherent electronic band states in Mn-substituted BaFe${}_2$As${}_2$
• A polarized neutron diffraction study of the field-induced magnetization in the normal and superconducting states of Ba(Fe1-xCox)2As2 (x=0.65)
• Orbital character effects in the photon energy and polarization dependence of pure C60 photoemission
• Doping dependence and electron-boson coupling in the ultrafast relaxation of hot electron populations in Ba(Fe_{1-x}Co_x)_2As_2
• Sn${}_{0.06}$Cr${}_3$Te${}_4$: A Skyrmion Superconductor
• Band structure and Fermi surfaces of the reentrant ferromagnetic superconductor Eu(Fe0.86Ir0.14)2As2
• Temperature and doping dependence of normal state spectral properties in a two-orbital model for ferropnictides
• Observation of a ubiquitous three-dimensional superconducting gap function in optimally-doped Ba${}_{0.6}$K${}_{0.4}$Fe${}_2$As${}_2$