Structure and superconductivity of LiFeAs.

  title={Structure and superconductivity of LiFeAs.},
  author={Michael J Pitcher and Dinah R. Parker and Paul Adamson and Sebastian J. C. Herkelrath and A. T. Boothroyd and Richard M. Ibberson and Michela Brunelli and Simon J. Clarke},
  journal={Chemical communications},
Lithium iron arsenide phases with compositions close to LiFeAs exhibit superconductivity at temperatures at least as high as 16 K, demonstrating that superconducting [FeAs](-) anionic layers with the anti-PbO structure type occur in at least three different structure types and with a wide range of As-Fe-As bond angles. 
Structure, antiferromagnetism and superconductivity of the layered iron arsenide NaFeAs.
A new layered iron arsenide NaFeAs isostructural with the superconducting lithium analogue displays evidence for the coexistence of superconductivity and magnetic ordering.
Superconductivity in ternary iron pnictides: AFe2As2 (A = alkali metal) and LiFeAs
Abstract Superconductivity is observed in AFe2As2 (A = Cs, Rb, K) at temperatures below 4 K. The metastable compound NaFe2As2 displays superconductivity with a high T c = 25 K . These compounds areExpand
Bulk Synthesis of Iron-based Superconductors
Exploratory synthesis efforts for iron-based superconductors (FeSC) have been driven by hopes of improving superconducting critical temperatures (TCs), providing high-quality samples for in-depthExpand
Superconductivity and magnetism in 11-structure iron chalcogenides in relation to the iron pnictides
  • David J. Singh
  • Materials Science, Medicine
  • Science and technology of advanced materials
  • 2012
The magnetism and superconductivity in ‘11’-type Fe chalcogenides, as compared to the Fe-pnictide materials show many differences, as might be anticipated from their very varied chemistries. Expand
Current status of iron-based superconductors
Current status of iron-based superconductors is summarized. Although short range magnetic ordering and magnetic phase separation of Fe are controversial, (long range) magnetic and electronic phaseExpand
New high-temperature superconductors based on rare-earth and transition metal oxyarsenides and related phases: synthesis, properties and simulations
The discovery in February 2008 of superconductivity with the transition temperature about 26 K in fluorine-doped oxyarsenide LaO1–xFxFeAs stimulated numerous studies of superconducting and otherExpand
Electronic structure of Fe-based superconductors
The electronic structure of the Fe-based superconductors is discussed, mainly from the point of view of first principles calculations in relation to experimental data. Comparisons and contrasts withExpand
Phase separation and superconductivity in Fe(1+x)Te(0.5)Se(0.5).
It is shown that the superconducting state is controlled by the stacking of its anti-PbO layers, such that homogeneous ordering hinders superconductivity and the highest volume fractions are observed in phase separated structures as evidenced by either a distribution of lattice parameters or microstrain. Expand
Chemistry and electronic structure of iron-based superconductors
The solid state provides a richly varied fabric for intertwining chemical bonding, electronic structure, and magnetism. The discovery of superconductivity in iron pnictides and chalcogenides hasExpand
Iron-based superconductors
For 22 years ceramic oxides of copper seemed to offer the only way to reach high-temperature superconductivity. Now, a new and unexpected route is being charted: through semimetal compounds of iron.


Superconductivity and phase diagram in iron-based arsenic-oxides ReFeAsO1−δ (Re = rare-earth metal) without fluorine doping
Here we report a new class of superconductors prepared by high-pressure synthesis in the quaternary family ReFeAsO1−δ (Re=Sm, Nd, Pr, Ce, La) without fluorine doping. The onset superconductingExpand
Iron-based layered superconductor La[O(1-x)F(x)]FeAs (x = 0.05-0.12) with T(c) = 26 K.
It is reported that a layered iron-based compound LaOFeAs undergoes superconducting transition under doping with F- ions at the O2- site and exhibits a trapezoid shape dependence on the F- content. Expand
Superconductivity at 43 K in an iron-based layered compound LaO1-xFxFeAs
It is reported that increasing the pressure causes a steep increase in the onset Tc of F-doped LaOFeAs, to a maximum of ∼43 K at ∼4 GPa, which is the highest Tc reported to date. Expand
Magnetic order close to superconductivity in the iron-based layered LaO1-xFxFeAs systems
Following the discovery of long-range antiferromagnetic order in the parent compounds of high-transition-temperature (high-Tc) copper oxides, there have been efforts to understand the role ofExpand
High pressure synthesis of late rare earth RFeAs(O,F) superconductors; R = Tb and Dy.
It is shown that high pressure may be used to synthesise late rare earth derivatives of the recently reported RFeAs(O,F) (R = La-Nd, Sm, Gd) high temperature superconductors. Expand
Superconducting Fe-based compounds (A1-xSrx)Fe2As2 with A=K and Cs with transition temperatures up to 37 K.
New high-T{c} Fe-based superconducting compounds, AFe2As2 with A=K, Cs, K/Sr, and Cs/SR, were synthesized, and their electronic and structural behavior demonstrate the crucial role of the (Fe2 as2) layers in the superconductivity of the Fe- based layered systems. Expand
Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO1-xFxFeAs.
The study reveals that the Ce 4f electrons form local moments and are ordered antiferromagnetically below 4 K, which could coexist with superconductivity, which strongly challenges the classic BCS theory based on the electron-phonon interaction. Expand
Pressure induced superconductivity in CaFe2As2.
CaFe2As2 has been found to be exceptionally sensitive to the application of hydrostatic pressure and can be tuned to reveal all the salient features associated with FeAs superconductivity withoutExpand
Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2.
The ternary iron arsenide BaFe2As2 becomes superconducting by hole doping, which was achieved by partial substitution of the barium site with potassium by substituting Ba2+ for K+ ions, and this class of superconductors by oxygen-free compounds with the ThCr2Si2-type structure was expanded. Expand
Superconductivity at 43 K in SmFeAsO1-xFx
Bulk superconductivity is found in the related compound SmFeAsO1-xFx, which has a ZrCuSiAsAs-type structure and resistivity and magnetization measurements reveal a transition temperature as high as 43 K, which provides a new material base for studying the origin of high-temperature super conductivity. Expand