A crossover in phase diagram of NaFe${}_{1-x}$Co${}_x$As determined by electronic transport measurements

Abstract

We report electronic transport measurements on single crystals of NaFe${}_{1-x}$Co${}_x$As system. We found that the cotangent of Hall angle, cot${\theta }_{\mathrm{H}}$, follows $T^4$ for the parent compound with filamentary superconductivity and $T^2$ for the heavily-overdoped non-superconducting sample. While it exhibits approximately $T^3$-dependence in all the superconducting samples, suggesting this behaivor is associated with bulk superconductivity in ferropnictides. A deviation develops below a characteristic temperature $T^{\ast }$ well above the structural and superconducting transitions, accompanied by a departure from power-law temperature dependence in resistivity. The doping dependence of $T^{\ast }$ resembles the crossover line of pseudogap phase in cuprates.

6 pages, 6 figures

References in corpus (11)

• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
• Superconductivity at 43 K in Samarium-arsenide Oxides $SmFeAs{O}_{1-x}{F}_x$
• High-temperature superconductivity in iron-based materials
• Superconductivity at 22 K in Co-doped BaFe2As2 Crystals
• Evidence for an electron nematic phase transition in underdoped iron pnictide superconductors
• An Intrinsic Bond-Centered Electronic Glass with Unidirectional Domains in Underdoped Cuprates
• Electronic liquid crystal state in the high-temperature superconductor YBCO(6.45)
• Nematic and meta-nematic transitions in the iron pnictides
• How Cooper pairs vanish approaching the Mott insulator in Bi2Sr2CaCu2O8+d
• Spin dynamics in the pseudogap state of a high-temperature superconductor
• Phase Diagram and Calorimetric Properties of NaFe${}_{1-x}$Co${}_x$As

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• Phase diagram and neutron spin resonance of superconducting NaFe${}_{1-x}$Cu${}_x$As
• Structural Evolution and Onset of the Density Wave Transition in the CDW Superconductor LaPt${}_2$Si${}_2$ Clarified with Synchrotron XRD
• Non-Conventional Critical Behavior and Q-dependent Electron-Phonon Coupling Induced Phonon Softening in the CDW Superconductor LaPt2Si2
• Local transformation of the Electronic Structure and Generation of Free Carriers in Cuprates and Ferropnictides under Heterovalent and Isovalent Doping
• New pairing mechanism via chiral electron-hole condensation for non-BCS superconductivity