Importance of Fermi surface topology for high temperature superconductivity in electron-doped iron arsenic superconductors

Abstract

We used angle resolved photoemission spectroscopy and thermoelectric power to study the poorly explored, highly overdoped side of the phase diagram of Ba(Fe1-xCox)2As2 high temperature superconductor. Our data demonstrate that several Lifshitz transitions - topological changes of the Fermi surface - occur for large x. Tc starts to decrease with doping when the cylindrical, central hole pocket changes to ellipsoids centering at the Z point, and goes to zero before these ellipsoids disappear around x = 0.2. Changes in thermoelectric power occur at similar x-values. Beyond this doping level the central pocket changes to electron-like and superconductivity does not exist. Our observations reveal the crucial importance of the underlying Fermiology in this class of materials. A necessary condition for superconductivity is the presence of the central hole pockets rather than perfect nesting between central and corner pockets.

arXiv commentTypo in names corrected. Minor changes to the text

References in corpus (19)

• Effects of Co substitution on thermodynamic and transport properties and anisotropic $H_{c2}$ in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ single crystals
• Determination of the phase diagram of the electron doped superconductor Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Anomalous suppression of the orthorhombic distortion in superconducting Ba[Fe(1-x)Cox]2As2
• FeAs-based superconductivity: a case study of the effects of transition metal doping on BaFe2As2
• Fermi surface nesting induced strong pairing in iron-based superconductors
• Superconductivity without magnetism in LiFeAs
• Critical change in the Fermi surface of iron arsenic superconductors at the onset of superconductivity
• Competing order and nature of the pairing state in the iron pnictides
• Role of multiband effects and electron-hole asymmetry in the superconductivity and normal state properties of Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• (pi,pi)-electronic order in iron arsenide superconductors
• Spin susceptibility, phase diagram, and quantum criticality in the electron-doped high Tc Superconductor Ba[Fe(1-x)Co(x)]2As2
• Resonant and crossover phenomena in a multiband superconductor tuning the chemical potential near a band edge
• Electronic structure of heavily electron-doped BaFe${}_{1.7}$Co${}_{0.3}$As${}_2$ studied by angle-resolved photoemission
• Evidence for Three-Dimensionality in the Fermi Surface Topology of Layered Electron Doped Ba(Fe1-XCox)2As2 Iron Superconductors
• Nesting between hole and electron pockets in Ba(Fe1-xCox)2As2 (x=0-0.3) observed with angle-resolved photoemission
• Thermoelectric power and Hall coefficient measurements on Ba(Fe(1-x)TMx)2As2 (TM = Co and Cu)
• Three- to Two-Dimensional Transition of the Electronic Structure in CaFe2As2 - parent compound for an iron arsenic high temperature superconductor
• Electron-Hole Asymmetry in Superconductivity of Pnictides Originated from the Observed Rigid Chemical Potential Shift
• Effective carrier type and field-dependence of the reduced-Tc superconducting state in SrFe(2-x)Ni(x)As2

Cited by in corpus (83)

• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• Critical role of substrate in the high temperature superconductivity of single layer FeSe on Nb:BaTiO${}_3$
• Temperature induced Lifshitz transition in WTe2
• Iron based superconductors: magnetism, superconductivity and electronic structure
• Iron based high transition temperature superconductors
• Role of the orbital degree of freedom in iron-based superconductors
• Do Transition Metal Substitutions Dope Carriers in Iron Based Superconductors?
• Dependence of carrier doping on the impurity potential in transition-metal-substituted FeAs-based superconductors
• Superconductivity above the lowest Earth temperature in pressurized sulfur hydride
• Crystallographic, Electronic, Thermal and Magnetic Properties of Single-Crystal SrCo2As2
• Crystal Growth and Physical Properties of SrCu2As2, SrCu2Sb2 and BaCu2Sb2
• Strong Correlations, Strong Coupling and s-wave Superconductivity in Hole-doped BaFe2As2 Single Crystals
• Superconducting and Normal State Properties of APd2As2 (A = Ca, Sr, Ba) Single Crystals
• Extraordinary quasiparticle scattering and bandwidth-control by dopants in iron-based superconductors
• Large temperature dependence of the number of carriers in Co-doped BaFe2As2
• What controls the phase diagram and superconductivity in Ru substituted BaFe${}_2$As${}_2$?
• Thermopower as sensitive probe of electronic nematicity in iron pnictides
• Stripe Antiferromagnetic Spin Fluctuations in SrCo${}_2$As${}_2$
• Co-substitution effects on the Fe-valence in the BaFe2As2 superconducting compound: A study of hard x-ray absorption spectroscopy
• Anomalous isotope effect near a 2.5 Lifshitz transition in a multi-band multi-condensate superconductor made of a superlattice of stripes
• Dramatic Changes in the Electronic Structure Upon Transition to the Collapsed Tetragonal Phase in CaFe2As2
• Electronic phase separation: recent progress in the old problem
• Muon spin rotation study of magnetism and superconductivity in Ba(Fe1-xCox)2As2 single crystals
• Possible Fano resonance for high Tc multi-gap superconductivity in p-Terphenyl doped by K at the Lifshitz transition
• Unusual temperature dependence of band dispersion in Ba(Fe(1-x)Ru(x))2As2 and its consequences for antiferromagnetic ordering
• Effect of doping on the magnetostructural ordered phase of iron arsenides: A comparative study of the resistivity anisotropy in the doped BaFe${}_2$As${}_2$ with doping into three different sites
• Intrinsic arrested nanoscale phase separation near a topological Lifshitz transition in strongly correlated two-band metals
• Effects of transition metal substitutions on the incommensurability and spin fluctuations in BaFe2As2 by elastic and inelastic neutron scattering
• Direct characterization of photo-induced lattice dynamics in BaFe2As2
• Electronic band structure of ferro-pnictide superconductors from ARPES experiment
• Inter-orbital topological superconductivity in spin-orbit coupled superconductors with inversion symmetry breaking
• Signatures of quantum criticality in the thermopower of Ba(Fe(1-x)Co(x))2As2
• Simultaneous emergence of superconductivity, inter-pocket scattering and nematic fluctuation in potassium-coated FeSe superconductor
• Signatures of quantum criticality in hole-doped and chemically pressurized EuFe_2As_2 single crystals
• Anomalous impurity effects in the iron-based superconductor KFe${}_2$As${}_2$
• Theory of the evolution of magnetic order in Fe${}_{1+y}$Te compounds with increasing interstitial iron
• Coexistence of multiple charge-density waves and superconductivity in SrPt2As2 revealed by 75As-NMR/NQR and 195Pt-NMR
• Low-energy interband transitions in the infrared response of Ba(Fe1-xCox)2As2
• Angle-resolved photoemission spectroscopy study on iron-based superconductors
• Electronic band structure of optimal superconductors: from cuprates to ferropnictides and back again
• Angle-Resolved Photoemission Spectroscopy Study of BaCo2As2
• Effects of Lifshitz Transition on Charge Transport in Magnetic Phases of Fe-Based Superconductors
• A weak-coupling superconductivity in the electron doped NaFe${}_{0.95}$Co${}_{0.05}$As is revealed by ARPES
• Superstripes and complexity in high-temperature superconductors
• Shape resonances in multi-condensate granular superconductors formed by networks of nanoscale-striped puddles
• Concise guide for electronic topological transitions
• Of Substitution and Doping: Spatial and Electronic Structure in Fe Pnictides
• The road map toward room temperature superconductivity: manipulating different pairing channels in systems composed of multiple electronic components
• Antiferromagnetic spin correlations and pseudogap-like behavior in Ca(Fe1-xCox)2As2 studied by 75As nuclear magnetic resonance and anisotropic resistivity
• Enhanced low-energy magnetic excitations via suppression of the itinerancy in Fe0.98-zCuzTe0.5Se0.5
• Pressure induced Lifshitz transition in ThFeAsN
• Transition-Metal Substitutions in Iron Chalcogenides
• Anomalous density of states in multiband superconductors near Lifshitz transition
• Superstripes : superconductivity in complex granular striped matter
• The Coulomb problem in iron based superconductors
• Importance of dxy orbital and electron correlation in iron-based superconductors revealed by phase diagram for 1111-system
• Fluctuations and pairing in Fe-based superconductors: Light scattering experiments
• Origin of the DC and AC conductivity anisotropy in iron-based superconductors: scattering rate versus spectral weight effects
• Impact of disorder on the superconducting transition temperature near a Lifshitz transition
• Lifshitz Transitions in 122-Pnictides Under Pressure
• Magnetic neutron scattering studies on the Fe-based superconductor system Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$
• 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
• Role of Sn impurity on electronic topological transitions in 122 Fe-based superconductors
• Scaling of the physical properties in Ba(Fe,Ni)2As2 single crystals: Evidence for quantum fluctuations
• Observation of charge accumulation and onsite Coulomb repulsion at transition metal impurities in the iron pnictides
• Substitution of Ni for Fe in superconducting Fe${}_{0.98}$Te${}_{0.5}$Se${}_{0.5}$ depresses the normal-state conductivity but not the magnetic spectral weight
• Electronic specific heat in BaFe${}_{2-x}$Ni${}_x$As${}_2$
• Unconventional Multi-gap Superconductivity and Antiferromagnetic Spin Fluctuations in New Iron-arsenide LaFe2As2 in Heavily Electron-doped Regime
• Superconducting Order Parameters in overdoped BaFe${}_{1.86}$Ni${}_{0.14}$As${}_2$ Revealed by Multiple Andreev Reflection Spectroscopy of Planar Break-Junctions
• Superconductivity on the verge of electronic topological transition in Fe based superconductors
• 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
• Winding numbers of nodal points in Fe-based superconductors
• Effect of electron doping in FeTe${}_{1-y}$Se${}_y$ realized by Co and Ni substitution
• Effect of transition-metal substitution in iron-based superconductors
• Enhanced low-energy magnetic excitations evidencing the Cu-induced localization in an Fe-based superconductor Fe${}_{0.98}$Te${}_{0.5}$Se${}_{0.5}$
• Pressure-temperature phase diagram of CaK(Fe${}_{1-x}$Mn${}_x$)${}_4$As${}_4$ for $x$=0.024
• Investigation of magnetic phases in parent compounds of Iron-chalcogenides via quasiparticle scattering interference
• Experimental and theoretical electronic structure of EuRh2As2
• Pressure induced superconducting dome in LaNiGa2
• Crystalline anisotropy induces a second antiferromagnetic phase in the absence of SDW in the heavily hydrogen-doped LaFeAsO${}_{1-x}$H${}_x$ $(x\sim 0.5)$
• Temperature and doping dependence of normal state spectral properties in a two-orbital model for ferropnictides
• Emergence of ferromagnetism due to Ir substitutions in single-crystalline Ba[Co(1 x)Ir(x)]2As2
• Observation of the Dirac Dispersions in Co-doped CaFe2As2