Control of the Competition between a Magnetic Phase and a Superconducting Phase in Cobalt-Doped and Nickel-Doped NaFeAs Using Electron Count

Parker, D. F.; Smith, Matthew J. P.; Lancaster, Tom; Steele, Andrew J.; Franke, Isabel; Baker, Peter J.; Pratt, F. L.; Pitcher, Michael J.; Blundell, Stephen J.; Clarke, Simon J.

doi:10.1103/physrevlett.104.057007

Cited by 116 publications

(77 citation statements)

References 27 publications

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“…Of all the known Fe-based superconductors, LiFeAs remains one of the most intriguing: Unlike other pnictides, such as BaFe 2 As 2 (Ref. 1) and NaFeAs, 2 LiFeAs is a superconductor in its stoichiometric form 3,4 and any chemical substitution on the Fe site (with Co or Ni, for instance) causes a reduction in the transition temperature T c . 5 In contrast with other systems, no ordered magnetic phase or structural transition has yet been observed in LiFeAs, a fact that has provoked much debate given the tendency for band-structure calculations to predict similar magnetic ground states to those seen in other pnictides.…”

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Magnetic fluctuations and spin freezing in nonsuperconducting LiFeAs derivatives

et al. 2013

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. (2013) Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details.

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Magnetic fluctuations and spin freezing in nonsuperconducting LiFeAs derivatives

et al. 2013

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“…[10])] strain, the generic features of the phase diagrams, such as a superconducting dome, are qualitatively the same. More intriguingly, differing from the universal doping range observed in cuprates [11], the sizes of the superconducting domes vary significantly in various families of FeHTS's [6][7][8][9][10][12][13][14][15]. For example, the superconductivity in BaðFe 1−x Co x Þ 2 As 2 disappears at 12% electron doping [7], while LaFeAsO 1−x H x shows superconductivity at the doping level as high as 40% [16].…”

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Extraordinary Doping Effects on Quasiparticle Scattering and Bandwidth in Iron-Based Superconductors

Zhang

Chen

et al. 2014

Phys. Rev. X

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The diversities in crystal structures and ways of doping result in extremely diversified phase diagrams for iron-based superconductors. With angle-resolved photoemission spectroscopy, we have systematically studied the effects of chemical substitution on the electronic structure of various series of iron-based superconductors. Beyond the Fermi-surface alteration that has been reported most often in the past, we found two more extraordinary effects of doping: (1) the site and band dependencies of quasiparticle scattering and, more importantly, (2) the ubiquitous and significant change of electronic correlation by both isovalent and heterovalent dopants in the iron-anion layer. Moreover, we found that the electronic correlation could be suppressed by applying either the chemical pressure or doping electrons but not by doping holes. Together with other findings provided here, these results complete the microscopic picture of the electronic effects of dopants, which facilitates a unified understanding of the diversified phase diagrams and resolutions to many open issues of various iron-based superconductors.

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“…The compound is less reactive with the environment than LiFeAs but the exposure to air strongly affects c T [68]. Replacing Fe by either Co or Ni suppresses the magnetism and enhances superconductivity [69]. For ARPES on NaFeAs, see [70,71].…”

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Iron-based superconductors: Magnetism, superconductivity, and electronic structure (Review Article)

Kordyuk

2012

Low Temperature Physics

218

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Angle resolved photoemission spectroscopy (ARPES) reveals the features of the electronic structure of quasitwo-dimensional crystals, which are crucial for the formation of spin and charge ordering and determine the mechanisms of electron-electron interaction, including the superconducting pairing. The newly discovered ironbased superconductors (FeSC) promise interesting physics that stems, on one hand, from a coexistence of superconductivity and magnetism and, on the other hand, from complex multi-band electronic structure. In this review I want to give a simple introduction to the FeSC physics, and to advocate an opinion that all the complexity of FeSC properties is encapsulated in their electronic structure. For many compounds, this structure was determined in numerous ARPES experiments and agrees reasonably well with the results of band structure calculations. Nevertheless, the existing small differences may help to understand the mechanisms of the magnetic ordering and superconducting pairing in FeSC.

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Control of the Competition between a Magnetic Phase and a Superconducting Phase in Cobalt-Doped and Nickel-Doped NaFeAs Using Electron Count

Cited by 116 publications

References 27 publications

Magnetic fluctuations and spin freezing in nonsuperconducting LiFeAs derivatives

Magnetic fluctuations and spin freezing in nonsuperconducting LiFeAs derivatives

Extraordinary Doping Effects on Quasiparticle Scattering and Bandwidth in Iron-Based Superconductors

Iron-based superconductors: Magnetism, superconductivity, and electronic structure (Review Article)

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