Renormalized behavior and proximity to a magnetic quantum critical point in BaCo${}_2$As${}_2$

Abstract

We report synthesis and single crystal measurements of magnetic, transport and thermal properties of single crystalline BaCo${}_2$As${}_2$ as well as first principles calculations of the electronic structure and magnetic behavior. These results show that BaCo${}_2$As${}_2$ is a highly renormalized paramagnet in proximity to a quantum critical point, presumably of ferromagnetic character and that BaFeNiAs${}_2$ behaves similarly. These results are discussed in relation to the properties of Ba(Fe,Co)${}_2$As${}_2$ and Ba(Fe,Ni)${}_2$As${}_2$, which are superconducting for low Co and Ni concentrations.

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Cited by in corpus (75)

• The Puzzle of High Temperature Superconductivity in Layered Iron Pnictides and Chalcogenides
• Electronic Structure of Fe-Based Superconductors
• Magnetic, Transport, and Thermal Properties of Single Crystals of the Layered Arsenide BaMn2As2
• Electronic structure and Magnetism in BaMn${}_2$As${}_2$ and BaMn${}_2$Sb${}_2$
• Hole-doped BaFe2-xCrxAs2 Crystals: A Case of Non-superconductivity
• Structure and Anisotropic Properties of BaFe2-xNixAs2 (x = 0, 1, 2) Single Crystals
• Magnetic interactions in iron superconductors: A review
• Crystallographic, Electronic, Thermal and Magnetic Properties of Single-Crystal SrCo2As2
• Crystal Growth and Physical Properties of SrCu2As2, SrCu2Sb2 and BaCu2Sb2
• Physical and magnetic properties of Ba(Fe_(1-x)Mn_x)_2As_2 single crystals
• Itinerant antiferromagnetism in BaCr${}_2$As${}_2$
• A variable temperature study of the crystal and magnetic structures of the giant magnetoresistant materials LnMnAsO (Ln = La, Nd)
• Dynamical correlations and screened exchange on the experimental bench: spectral properties of the cobalt pnictide BaCo2As2
• Two successive field-induced spin-flop transitions in single-crystalline CaCo${}_2$As${}_2$
• Magnetic properties in layered (K, Rb and Cs)Co2Se2 with ThCr2Si2_type structure
• Superconductivity in NdFe1-xCoxAsO (0.05 < x < 0.20) and rare-earth magnetic ordering in NdCoAsO
• Dynamical screening in correlated electron systems - from lattice models to realistic materials
• Ni${}_2$X${}_2$ (X=pnictide, chalcogenide, or B) Based Superconductors
• Stripe Antiferromagnetic Spin Fluctuations in SrCo${}_2$As${}_2$
• Effects of cobalt doping and three-dimensionality in $BaF{e}_{2}A{s}_2$
• Crystal and Magnetic Structure of CaCo{1.86}As2 Studied by X-ray and Neutron Diffraction
• Nd induced Mn spin-reorientation transition in NdMnAsO
• Electronic properties of 3d transitional metal pnictides : A comparative study by optical spectroscopy
• Electronic structure of BaCu${}_2$As${}_2$ and SrCu${}_2$As${}_2$: sp-band metals
• Crystals, magnetic and electronic properties of a new ThCr2Si2-type BaMn2Bi2 and K-doped compositions
• Magnetic Phase Transitions in NdCoAsO
• Electronic band structure of BaCo${}_2$As${}_2$: a fully-doped ferropnictide with reduced electronic correlations
• Electronic structure of Ba(Fe,Ru)2As2 and Sr(Fe,Ir)2As2 alloys
• Evolution of the bulk properties, structure, magnetic order, and superconductivity with Ni doping in CaFe2-xNixAs2
• Narrow Bandgap in beta-BaZn2As2 and Its Chemical Origins
• The Electronic Phase Diagram of the Iron-based High Tc Superconductor Ba(Fe(1-x)Co(x))2As2 Under Hydrostatic Pressure (0 < x <0.099)
• Bulk Synthesis of Iron-based Superconductors
• Metamagnetic transition in Ca${}_{1-x}$Sr${}_x$Co${}_2$As${}_2$($x$ = 0 and 0.1) single crystals
• BaT2As2 Single Crystals (T = Fe, Co, Ni) and Superconductivity upon Co-doping
• Antiferromagnetism in trigonal SrMn2As2 and CaMn2As2 single crystals
• Coexistence of ferromagnetic and stripe antiferromagnetic spin fluctuations in SrCo${}_2$As${}_2$
• Novel weak-ferromagnetic metallic state in heavily doped Ba${}_{1-x}$K${}_x$Mn${}_2$As${}_2$
• Quantum-critical scale invariance in a transition metal alloy
• Antiferromagnetism in semiconducting SrMn2Sb2 and BaMn2Sb2 single crystals
• Crystallography and Physical Properties of BaCo2As2, Ba{0.94}K{0.06}Co2As2 and Ba{0.78}K{0.22}Co2As2
• Strong electronic correlations in iron pnictides: Comparison of the optical spectra for BaFe2As2-related compounds
• Electronic structure and spin dynamics of ACo2As2 (A=Ba, Sr, Ca)
• Angle-Resolved Photoemission Spectroscopy Study of BaCo2As2
• Ba(Zn,Co)2As2: a II-II-V Diluted Ferromagnetic Semiconductor with N-type Carriers
• Properties of KCo${}_2$As${}_2$ and Alloys with Fe and Ru: Density Functional Calculations
• Ferromagnetic cluster-glass phase in Ca(Co,Ir)2As2 crystals
• Pressure-induced collapsed-tetragonal phase in SrCo2As2
• Flat band magnetism and helical magnetic order in Ni-doped SrCo${}_2$As${}_2$
• NMR investigation of spin correlations in BaCo2As2
• Magnetism and superconductivity in the layered hexagonal transition metal pnictides
• Competing magnetic phases and itinerant magnetic frustration in SrCo${}_2$As${}_2$
• Superconductivity in a layered cobalt oxychalcogenide Na${}_2$CoSe${}_2$O with a triangular lattice
• Large negative magnetoresistance in BaMn${}_2$Bi${}_2$ antiferromagnet
• Suppression of magnetic order in CaCo${}_{1.86}$As${}_2$ with Fe substitution: Magnetization, neutron diffraction, and x-ray diffraction studies of Ca(Co${}_{1-x}$Fe${}_x$)${}_y$As${}_2$
• Whether it is possible to stabilize the 1144-phase pnictides with tri-valence cations?
• Evolution of Structure and Superconductivity in Ba(Ni${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Antiferromagnetic Stacking of Ferromagnetic Layers and Doping Controlled Phase Competition in Ca${}_{1-x}$Sr${}_x$Co${}_{2-y}$As${}_2$
• Orbital localization and the role of the Fe and As $4p$ orbitals in BaFe${}_2$As${}_2$ probed by XANES
• Fermi surfaces and Phase Stability of Ba(Fe${}_{1-x}$M${}_x$)${}_2$As${}_2$ (M=Co, Ni, Cu, Zn)
• Isotropic Quenched Disorder Triggers a Robust Nematic State in Electron-Doped Pnictides
• Suppression of ferromagnetism governed by a critical lattice parameter in CeTiGe$\_3$ with hydrostatic pressure or V substitution
• Theoretical investigation of the electronic and magnetic properties of the orthorhombic phase of Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Magnetic polarization of Ir in underdoped, non-superconducting Eu(Fe${}_{0.94}$Ir${}_{0.06}$)${}_2$As${}_2$
• Influence of the surface symmetry breaking on the magnetism, collapsing and three dimensional dispersion of Co pnictides ACo2As2 (A=Ba, Sr, Ca)
• CoAs: The line of 3d demarcation
• Spin polarization of Ru in superconducting Ba(Fe${}_{0.795}$Ru${}_{0.205}$)${}_2$As${}_2$ studied by x-ray resonant magnetic scattering
• Unconventional Multi-gap Superconductivity and Antiferromagnetic Spin Fluctuations in New Iron-arsenide LaFe2As2 in Heavily Electron-doped Regime
• Novel polymorphic phase of BaCu2As2: impact of flux for new phase formation in crystal growth
• Superconductivity with Tc=7 K under pressure for Cu-, and Au-doped BaFe2As2
• Competing magnetic fluctuations and orders in a multiorbital model of doped SrCo${}_2$As${}_2$
• Suppression of antiferromagnetic order and strong ferromagnetic spin fluctuations in Ni-doped CaCo2As2 single crystals
• Absence of itinerant ferromagnetism in a cobalt-based oxypnictide
• Europium $c$-axis ferromagnetism in Eu(Co${}_{1-x}$Ni${}_x$)${}_{2-y}$As${}_2$: A single-crystal neutron diffraction study
• Emergence of ferromagnetism due to Ir substitutions in single-crystalline Ba[Co(1 x)Ir(x)]2As2
• Electronic structure of $A$Co${}_2$As${}_2$ ($A=$ Ca, Sr, Ba, Eu) studied using angle-resolved photoemission spectroscopy and theoretical calculations