Hall-plot of the phase diagram for Ba(Fe1-xCox)2As2

Abstract

The Hall effect is a powerful tool for investigating carrier type and density. For single-band materials, the Hall coefficient is traditionally expressed simply by $R_H^{-1}=-en$, where $e$ is the charge of the carrier, and $n$ is the concentration. However, it is well known that in the critical region near a quantum phase transition, as it was demonstrated for cuprates and heavy fermions, the Hall coefficient exhibits strong temperature and doping dependencies, which can not be described by such a simple expression, and the interpretation of the Hall coefficient for Fe-based superconductors is also problematic. Here, we investigate thin films of Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ with compressive and tensile in-plane strain in a wide range of Co doping. Such in-plane strain changes the band structure of the compounds, resulting in various shifts of the whole phase diagram as a function of Co doping. We show that the resultant phase diagrams for different strain states can be mapped onto a single phase diagram with the Hall number. This universal plot is attributed to the critical fluctuations in multiband systems near the antiferromagnetic transition, which may suggest a direct link between magnetic and superconducting properties in the BaFe${}_2$As${}_2$ system.

arXiv commentAccepted for publication in Scientific Reports, 6 main figures plus Supplemental Information (8 figures)

References in corpus (29)

• The Puzzle of High Temperature Superconductivity in Layered Iron Pnictides and Chalcogenides
• Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
• Evidence for an electron nematic phase transition in underdoped iron pnictide superconductors
• Magnetic order in BaFe2As2, the parent compound of the FeAs based superconductors in a new structural family
• 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${}_2$
• Nematic and meta-nematic transitions in the iron pnictides
• Quantum critical point lying beneath the superconducting dome in iron-pnictides
• Normal-State Spin Dynamics and Temperature-Dependent Spin Resonance Energy in an Optimally Doped Iron Arsenide Superconductor
• Competition and coexistence of antiferromagnetism and superconductivity in underdoped Ba(Fe0.953Co0.047)2As2
• In-plane electronic anisotropy of underdoped "122" Fe-arsenide superconductors revealed by measurements of detwinned single crystals
• Hall Effect and Resistivity in High-Tc Superconductors: The Conserving Approximation
• Role of multiband effects and electron-hole asymmetry in the superconductivity and normal state properties of Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Hole and Electron Contributions to the Transport Properties of Ba(Fe_(1-x)Ru_x)_2As_2 Single Crystals
• Effect of uniaxial strain on the structural and magnetic phase transitions in BaFe${}_2$As${}_2$
• Quantum Criticality in Electron-doped BaFe_{2-x}Ni_xAs_2
• Dependence of carrier doping on the impurity potential in transition-metal-substituted FeAs-based superconductors
• Thermoelectric power and Hall coefficient measurements on Ba(Fe(1-x)TMx)2As2 (TM = Co and Cu)
• Scaling between magnetic and lattice fluctuations in iron-pnictide superconductors
• Electron-Hole Asymmetry in Superconductivity of Pnictides Originated from the Observed Rigid Chemical Potential Shift
• Strain induced superconductivity in the parent compound BaFe2As2
• Orbital character variation of the Fermi surface and doping dependent changes of the dimensionality in BaFe2-xCoxAs2 from angle-resolved photoemission spectroscopy
• Thermal expansion and Grüneisen parameters of Ba(Fe1-xCox)2As2 - a thermodynamic quest for quantum criticality
• ARPES experiment in fermiology of quasi-2D metals (Review Article)
• Different effects of Ni and Co substitution on the transport properties of BaFe2As2
• Temperature and Pressure Dependence of the Fe-specific Phonon Density of States in Ba(Fe(1-x)Co(x))2As2
• Critical Behavior of the SDW Transition in Underdoped Ba(Fe1-xCox)2As2 (x <=0.05): 75As NMR Investigation
• Superconducting properties of K${}_{1-x}$Na${}_x$Fe${}_2$As${}_2$ under pressure
• Advanced surface characterization of Ba(Fe${}_{0.92}$Co${}_{0.08}$)${}_2$As${}_2$ epitaxial thin films

Cited by in corpus (15)

• Aspects of the Synthesis of Thin Film Superconducting Infinite-Layer Nickelates
• High-field transport properties of a P-doped BaFe2As2 film on technical substrate
• Enhanced critical-current in P-doped BaFe2As2 thin films on metal substrates arising from poorly aligned grain boundaries
• Effect of biaxial strain on the phase transitions of Ca(Fe1-xCox)2As2
• Superconducting properties of Ba(Fe1-xNix)2As2 thin films in high magnetic fields
• The influence of the in-plane lattice constant on the superconducting transition temperature of FeSe0.7Te0.3 thin films
• Universal scaling behavior of the upper critical field in strained FeSe0.7Te0.3 thin films
• Memory matrix theory of the dc resistivity of a disordered antiferromagnetic metal with an effective composite operator
• Realization of epitaxial thin films of the superconductor K-doped BaFe${}_{\text{2}}$As${}_{\text{2}}$
• Selective mass enhancement close to the quantum critical point in BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Inter- to Intra-Layer Resistivity Anisotropy of NdFeAs(O,H) with Various Hydrogen Concentrations
• Pressure tuned superconductivity and normal state behavior in Ba(Fe${}_{0.943}$Co${}_{0.057}$)${}_2$As${}_2$ near the antiferromagnetic boundary
• Majority carrier type inversion in FeSe family and "doped semimetal" scheme in iron-based superconductors
• Novel method to study strain effect of thin films using a piezoelectric-based device and a flexible metallic substrate
• The thermoelectric conversion efficiency problem: Insights from the electron gas thermodynamics close to a phase transition