Crystal Chemistry and Structural Design of Iron-Based Superconductors

Hao Jiang; Yun-Lei Sun; Zhu-An Xu; Guang-Han Cao

doi:10.1088/1674-1056/22/8/087410

paper

Crystal Chemistry and Structural Design of Iron-Based Superconductors

arXiv:1605.04179 · doi:10.1088/1674-1056/22/8/087410

Abstract

The second class of high-temperature superconductors (HTSCs), iron-based pnictides and chalcogenides, necessarily contain Fe $_{2}$ $X_{2}$ (" $X$ " refers to a pnictogen or a chalcogen element) layers, just like the first class of HTSCs which possess the essential CuO $_{2}$ sheets. So far, dozens of iron-based HTSCs, classified into nine groups, have been discovered. In this article, the crystal-chemistry aspects of the known iron-based superconductors are reviewed and summarized by employing "hard and soft acids and bases (HSAB)" concept. Based on these understandings, we propose an alternative route to exploring new iron-based superconductors via rational structural design.

12 pages, 9 figures, 4 tables

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Superconductivity and Ferromagnetism in Hole-Doped RbEuFe $_{4}$ As $_{4}$
Spin fluctuations in iron pnictides and chalcogenides: From antiferromagnetism to superconductivity
Anomalous Eu Valence State and Superconductivity in Undoped Eu3Bi2S4F4
A New ZrCuSiAs-Type Superconductor: ThFeAsN
Crystal Structure and Superconductivity at about 30 K in $A$ Ca $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$ ( $A$ = Rb, Cs)
A New Ferromagnetic Superconductor: CsEuFe $_{4}$ As $_{4}$
Neutron spin resonance in a quasi-two-dimensional iron-based superconductor
Giant anisotropy in superconducting single crystals of CsCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$
Synthesis, crystal structure and superconductivity in Rb $L n_{2}$ Fe $_{4}$ As $_{4}$ O $_{2}$ ( $L n$ = Sm, Tb, Dy and Ho)
Two-gap superconductivity with line nodes in CsCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$
Superconductivity at 33 - 37 K in $A L n_{2}$ Fe $_{4}$ As $_{4}$ O $_{2}$ ( $A$ = K and Cs; $L n$ = Lanthanides)
Physical properties and electronic structure of Sr $_{2}$ Cr $_{3}$ As $_{2}$ O $_{2}$ containing CrO $_{2}$ and Cr $_{2}$ As $_{2}$ square-planar lattices
RbEu(Fe $_{1 - x}$ Ni $_{x}$ ) $_{4}$ As $_{4}$ : From a ferromagnetic superconductor to a superconducting ferromagnet
Unique interplay between superconducting and ferromagnetic orders in EuRbFe $_{4}$ As $_{4}$
BaTh $_{2}$ Fe $_{4}$ As $_{4}$ (N $_{0.7}$ O $_{0.3}$ ) $_{2}$ : An Iron-Based Superconductor Stabilized by Inter-Block-Layer Charge Transfer
Novel magnetic stoichiometric superconductor EuRbFe4As4
Effect of antifluorite layer on the magnetic order in Eu-based 1111 compounds, EuTAsF (T = Zn, Mn, and Fe)
Quasi-two-dimensional heterostructures (K $M_{1 - x}$ Te)(LaTe $_{3}$ ) ( $M$ = Mn, Zn) with charge density waves
Absence of itinerant ferromagnetism in a cobalt-based oxypnictide
Role of Vanadium-Oxide Layer in Electronic State of Sr $_{2}$ VFeAsO $_{3 - δ}$ with Oxygen Deficiency
Crystal growth and characterization of a hole-doped iron-based superconductor Ba(Fe $_{0.875}$ Ti $_{0.125}$ ) $_{2}$ As $_{2}$