Structural, magnetic and electronic properties of the iron-chalcogenide AxFe2−ySe2 (A=K, Cs, Rb, and Tl, etc.) superconductors

@article{Mou2011StructuralMA,
  title={Structural, magnetic and electronic properties of the iron-chalcogenide AxFe2−ySe2 (A=K, Cs, Rb, and Tl, etc.) superconductors},
  author={Daixiang Mou and Lin Zhao and Xingjiang Zhou},
  journal={Frontiers of Physics},
  year={2011},
  volume={6},
  pages={410-428}
}
The latest discovery of a new iron-chalcogenide superconductor AxFe2−ySe2 (A =K, Cs, Rb, and Tl, etc.) has attracted much attention due to a number of its unique characteristics, such as the possible insulating state of the parent compound, the existence of Fe-vacancy and its ordering, a new form of magnetic structure and its interplay with superconductivity, and the peculiar electronic structures that are distinct from other Fe-based superconductors. In this paper, we present a brief review on… 
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References

SHOWING 1-10 OF 130 REFERENCES
Electronic and magnetic structures of the ternary iron selenides AFe(2)Se(2) ( A = Cs, Rb, K, or Tl)
We have studied the electronic and magnetic structures of the ternary iron selenides AFe(2)Se(2) (A = Cs, Rb, K, or Tl) using first-principles electronic structure calculations. We find that the
The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides
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,
Electronic Structures and Magnetic Order of Ordered-Fe-Vacancy Ternary Iron Selenides TlFe1.5Se2 and AFe(1.5)Se(2) (A = K, Rb, or Cs)
By the first-principles electronic structure calculations, we find that the ground state of the Fe-vacancies ordered TlFe1.5Se2 is a quasi-two-dimensional collinear antiferromagnetic semiconductor
Electronic structure and Fermi surface of new K intercalated iron selenide superconductor KxFe2Se2
Abstract Using the ab initio FLAPW-GGA method we examine the electronic band structure, densities of states, and the Fermi surface topology for a very recently synthesized ThCr 2 Si 2 -type potassium
Theory for superconductivity in (Tl,K)FexSe2 as a doped Mott insulator
Possible superconductivity in the recently discovered (Tl,K)FexSe2 compounds is studied from the viewpoint of doped Mott insulator. The Mott insulating phase is examined to be preferred in the parent
Neutron-diffraction measurements of magnetic order and a structural transition in the parent BaFe2As2 compound of FeAs-based high-temperature superconductors.
The recent discovery of superconductivity in (Ba,K)Fe2As2, which crystallizes in the ThCr2Si2 (122) structure as compared with the LnFeAsO (Ln is lanthanide) systems that possess the ZrCuSiAs (1111)
Fe-based superconductivity with Tc=31 K bordering an antiferromagnetic insulator in (Tl,K) FexSe2
(Tl,K)FexSe2 single crystals were first successfully synthesized with the Bridgeman method. The physical properties are characterized by electrical resistivity, magnetic susceptibility and Hall
Magnetism in Fe-based superconductors.
TLDR
Studies of the spin dynamics of the parent compounds show that the interactions are best characterized as anisotropic three-dimensional interactions, and analysis of the low temperature spin waves under the assumption of a Heisenberg Hamiltonian indicates strong in-plane anisotropy with a significant next-nearest-neighbor interaction.
Unusual electronic structure and observation of dispersion kink in CeFeAsO parent compound of FeAs-based superconductors.
TLDR
The first comprehensive high-resolution angle-resolved photoemission measurements on CeFeAsO, a parent compound of FeAs-based high temperature superconductors with a magnetic-structural transition at ∼150 K, find the unusual Fermi surface topology deviates strongly from the band structure calculations.
Common crystalline and magnetic structure of superconducting A2Fe4Se5 (A=K,Rb,Cs,Tl) single crystals measured using neutron diffraction.
TLDR
All recently discovered A intercalated iron selenide superconductors share the common crystalline and magnetic structure, which are very different from previous families of Fe-basedsuperconductors, and constitute a distinct new 245 family.
...
1
2
3
4
5
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