The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides

By D. Johnston. 2010

1,295 citations recorded by the source corpus.

The response of the worldwide scientific community to the discovery in 2008 of superconductivity at T c = 26 K in the Fe-based compound LaFeAsO1−x F x has been very enthusiastic. In short order, other Fe-based superconductors with the same or related crystal structures were discovered with T c up to 56 K. Many experiments were carried out and theories formulated to try to understand the basic properties of these new materials and the mechanism for T c. In this selective critical review of the experimental literature, we distill some of this extensive body of work, and discuss relationships between different types of experiments on these materials with reference to theoretical concepts and models. The experimental normal-state properties are emphasized, and within these the electronic and magnetic properties because of the likelihood of an electronic/magnetic mechanism for superconductivity in these materials.

Subfields: Biomedical Engineering, Electronic, Optical and Magnetic Materials, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/b7ea8fff23df394b29e954f74c28a251629aa77f

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Citations in the corpus

Iron-based superconductors at high magnetic fields (2011, background): “Another essential effect of anisotropy results from the short coherence length ξc of FBSs along the c-axis which can be smaller than the spacing c between the ab planes, particularly for Fe-11 [10].”
Iron-based high transition temperature superconductors (2014, background): “Although the electronic phase diagrams for different families of iron-based superconductors can be somewhat different [21], they all share the common feature of anAForderedparent compound [68].”
Superconductivity in iron compounds (2011, background): “…Mizuguchi and Takano (2010) (the iron chalcogenides), Mandrus et al. (2010) (BaFe2As2 and dopings thereof), Paglione and Greene (2010) (overview), Johnston (2010) (comprehensive overview, emphasis on normal state properties), Ivanovskii (2011) (the 122 defect structure superconductors), and…”
Phase separation and magnetic order in K-doped iron selenide superconductor (2011, background): “Previous studies of iron-based superconductors usually suffer from various imperfections in the material”
In-plane electronic anisotropy of underdoped ‘122’ Fe-arsenide superconductors revealed by measurements of detwinned single crystals (2011, methodology): “3d in Dusza et al 2011). It is especially interesting to compare the temperature dependence of the dc (Δρ/ρ) and optical (Δσ1(ω)) anisotropy in the temperature range T > Ts for which a large induced anisotropy is observed in the resistivity for stressed crystals (Section 3). Two characteristic frequ”
Electronic instabilities of kagome metals: Saddle points and Landau theory (2021, background): “These topics have been most heavily investigated in theory and experiment in structures based on square lattices in the cuprates [4, 13] and Fe superconductors [3, 14, 15].”
Angle-resolved photoemission studies of quantum materials (2020, neutral): “24(b)(d), red square) (Johnston, 2010).”
Introduction to holographic superconductor models (2015, methodology): “Upon switching on the interband coupling between the two components, this model can describe the phenomenon of the two gaps in materials such as MgB2 (s++) [138, 139] and iron pnictides (s+−) [140, 141, 142].”
London penetration depth in iron-based superconductors (2011, methodology): “to pair-breaking scattering and gap anisotropy; 3) doping dependent three-dimensional gap structure possibly with nodes. For some reviews of various experiments and theories the reader is referred to [4, 5, 6, 7, 16, 17, 18, 11, 19]. Here we focus on London penetration depth as a sensitive tool to s”