What controls the phase diagram and superconductivity in Ru substituted BaFe${}_2$As${}_2$?

Abstract

We use high resolution angle-resolved photoemission to study the electronic structure of the iron based high-temperature superconductors Ba(Fe${}_{1-x}$Ru${}_x$)${}_2$As${}_2$ as a function of Ru concentration. We find that substitution of Ru for Fe is isoelectronic, i. e., it does not change the value of the chemical potential. More interestingly, there are no measured, significant changes in the shape of the Fermi surface or in the Fermi velocity over a wide range of substitution levels ($0<x<0.55$). Given that the suppression of the antiferromagnetic and structural phase has been associated with the emergence of the superconducting state, Ru substitution must achieve this via a mechanism that does not involve changes of the Fermi surface. We speculate that this mechanism relies on magnetic dilution which leads to the reduction of the effective Stoner enhancement.

arXiv comment5 pages, 5 figures, accepted for publication in Physical Review Letters

References in corpus (39)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• The Puzzle of High Temperature Superconductivity in Layered Iron Pnictides and Chalcogenides
• Superconductivity at 22 K in Co-doped BaFe2As2 Crystals
• Superconductivity up to 37 K in (A1-xSrx)Fe2As2 with A=K and Cs
• Funtional Renormalization Group Study of the Pairing Symmetry and Pairing Mechanism of the FeAs Based High Temperature Superconductors
• A Numerical Renormalization Group Study of the Superconducting and Spin Density Wave Instabilities in MFeAsO${}_{1-x}$F${}_x$ Compounds
• FeAs-based superconductivity: a case study of the effects of transition metal doping on BaFe2As2
• Superconductivity up to 30 K in the vicinity of quantum critical point in BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Competition and coexistence of antiferromagnetism and superconductivity in underdoped Ba(Fe0.953Co0.047)2As2
• Similarities between structural distortions under pressure and chemical doping in superconducting BaFe2As2
• Coexistence of static magnetism and superconductivity in SmFeAsO1-xFx as revealed by muon spin rotation
• 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
• Unconventional pairing in the iron arsenide superconductors
• Evolution of the Fermi surface of BaFe_2(As_{1-x}P_x)_2 on entering the superconducting dome
• Complete pressure dependent phase diagrams for SrFe2As2 and BaFe2As2
• Where Are the Extra d Electrons in Transition-Metal Substituted Fe Pnictides?
• Importance of Fermi surface topology for high temperature superconductivity in electron-doped iron arsenic superconductors
• Interplay between magnetism and superconductivity in Fe-pnictides
• Superconductivity in Ru substituted BaFe2-xRuxAs2
• Physical and magnetic properties of Ba(Fe${}_{1-x}$Ru${}_x$)${}_2$As${}_2$ single crystals
• Evidence for Three-Dimensionality in the Fermi Surface Topology of Layered Electron Doped Ba(Fe1-XCox)2As2 Iron Superconductors
• 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
• First-principles calculation of transition-metal impurities in LaFeAsO
• Electron-Hole Asymmetry in Superconductivity of Pnictides Originated from the Observed Rigid Chemical Potential Shift
• Superconductivity induced by ruthenium substitution in an iron arsenide: investigation of SrFe2-xRuxAs2 (0 <= x <= 2)
• Magnetic ordering and structural distortion in Ru doped BaFe2As2 single crystals studied by Neutron and X-ray diffraction
• Isoelectronic Ru substitution at Fe-site in Sm(Fe1-xRux)As(O0.85F0.15) compound and its effects on structural, superconducting and normal state properties
• Orbital character variation of the Fermi surface and doping dependent changes of the dimensionality in BaFe2-xCoxAs2 from angle-resolved photoemission spectroscopy
• Significant reduction of electronic correlations upon isovalent Ru substitution of BaFe2As2
• Coexistence of superconductivity and a spin density wave in pnictides: Gap symmetry and nodal lines
• Chemical Pressure and Physical Pressure in BaFe_2(As_{1-x}P_{x})_2
• Two- and Three-Dimensional Fermi Surfaces and their Nesting Properties in Superconducting BaFe2(As1-xPx)2
• Microscopic origin of pressure-induced phase transitions in iron-pnictide $AF{e}_{2}A{s}_2$ superconductors: an {ab initio} molecular-dynamics study
• Electronic structure of Ba(Fe,Ru)2As2 and Sr(Fe,Ir)2As2 alloys
• Dissimilarities between the electronic structure of chemically doped and chemically pressurized iron pnictides from an angle-resolved photoemission spectroscopy study
• Fermi-Suface Evolution by Transition-metal Substitution in the Iron-based Superconductor LaFeAsO
• Thermoelectric power of Ba(Fe1-xRux)2As2 and Ba(Fe1-xCox)2As2: possible changes of Fermi surface with and without changes in electron count

Cited by in corpus (42)

• Preemptive nematic order, pseudogap, and orbital order in the iron pnictides
• Iron based high transition temperature superconductors
• KFe_2Se_2 is the parent compound of K-doped iron selenide superconductors
• Enhancement of the superconducting gap by nesting in CaKFe4As4 - a new high temperature superconductor
• Enhancement of $T_c$ by disorder in underdoped iron pnictides
• Crystal Growth and Physical Properties of SrCu2As2, SrCu2Sb2 and BaCu2Sb2
• Superconducting and Normal State Properties of APd2As2 (A = Ca, Sr, Ba) Single Crystals
• Strain induced superconductivity in the parent compound BaFe2As2
• Effect of electron irradiation on superconductivity in single crystals of Ba(Fe${}_{1-x}$Ru${}_x$)${}_2$As${}_2$ ($x=$0.24)
• Dramatic Changes in the Electronic Structure Upon Transition to the Collapsed Tetragonal Phase in CaFe2As2
• Unusual temperature dependence of band dispersion in Ba(Fe(1-x)Ru(x))2As2 and its consequences for antiferromagnetic ordering
• Physical Properties of Metallic Antiferromagnetic CaCo{1.86}As2 Single Crystals
• ARPES measurements of the superconducting gap of Fe-based superconductors and their implications to the pairing mechanism
• Effects of Ru Substitution on Dimensionality and Electron Correlations in Ba(Fe_{1-x}Ru_x)_2As_2
• Unconventional Hall effect in pnictides from interband interactions
• Effects of disordered Ru substitution in BaFe${}_2$As${}_2$: Realization of superdiffusion mechanism in real materials
• Microscopic coexistence of superconductivity and antiferromagnetism in underdoped Ba(Fe1-xRux)2As2
• Angle-Resolved Photoemission Spectroscopy Study of BaCo2As2
• Microscopic Coexistence of Magnetism and Superconductivity in charge compensated Ba1-xKx(Fe1-yCoy)2As2
• Origin of structural and magnetic transitions in BaFe${}_{2-x}$Ru${}_x$As${}_2$ materials
• A view from inside iron-based superconductors
• Nanoscale textured superconductivity in Ru-substituted BaFe2As2 : a challenge to a universal phase diagram for the pnictides
• Ambipolar suppression of superconductivity by ionic gating in optimally-doped BaFe2(As,P)2 ultrathin films
• Pressure induced Lifshitz transition in ThFeAsN
• Ru-doping on iron based pnictides: the "unfolded" dominant role of structural effects for superconductivity
• Electronic structures of doped BaFe${}_2$As${}_2$ materials: virtual crystal approximation versus super-cell approach
• Effects of Zn substitution on the electronic structure of BaFe${}_2$As${}_2$ revealed by angle-resolved photoemission spectroscopy
• Angle-resolved photoemission spectroscopy observation of anomalous electronic states in EuFe${}_2$As${}_{2-x}$P${}_x$
• Suppression of backward scattering of Dirac fermions in iron pnictides Ba(Fe${}_{1-x}$Ru${}_x$As)${}_2$
• ARPES observation of isotropic superconducting gaps in isovalent Ru-substituted Ba(Fe${}_{0.75}$Ru${}_{0.25}$)${}_2$As${}_2$
• Magnetically polarized Ir dopant atoms in superconducting Ba(Fe${}_{1-x}$Ir${}_x$)${}_2$As${}_2$
• Pressure effects on the electronic properties of the undoped superconductor ThFeAsN
• Multi-band effects in in-plane resistivity anisotropy of strain-detwinned disordered Ba(Fe${}_{1-x}$Ru${}_x$)${}_2$As${}_2$
• Reversible Tuning of the Collapsed Tetragonal Phase Transition in CaFe2As2 by Separate Control of Chemical Pressure and Electron Doping
• Spin polarization of Ru in superconducting Ba(Fe${}_{0.795}$Ru${}_{0.205}$)${}_2$As${}_2$ studied by x-ray resonant magnetic scattering
• Study of the hyperfine fields in the BaFe${}_2$As${}_2$ family and its relation to the magnetic moment
• Electronic structure of ruthenium-doped iron chalcogenides
• Effect of transition-metal substitution in iron-based superconductors
• Unusual nodal behaviors of the superconducting gap in the iron-based superconductor Ba(Fe${}_{0.65}$Ru${}_{0.35}$)${}_2$As${}_2$: Effects of spin-orbit coupling
• Disorder correction to the Néel temperature of ruthenium-doped BaFe${}_2$As${}_2$: Theoretical analysis
• Magnetotransport properties in the magnetic phase of BaFe${}_{2-x}$T${}_x$As${}_2$ (T = Co,Ni): A magnetic excitations approach
• Reaching Quantum Critical Point by Adding Non-magnetic Disorder in Single Crystals of Superconductor $({\text{Ca}}_x{\text{Sr}}_{1-x}{)}_3{\text{Rh}}_4{\text{Sn}}_{13}$