Magnetic interactions in iron superconductors: A review

  title={Magnetic interactions in iron superconductors: A review},
  author={Elena Bascones and Bel'en Valenzuela and Mar{\'i}a J Calder{\'o}n},
  journal={Comptes Rendus Physique},

Nematicity, magnetism and superconductivity in FeSe

  • A. BöhmerA. Kreisel
  • Physics
    Journal of physics. Condensed matter : an Institute of Physics journal
  • 2018
An overview of nematicity, magnetism and superconductivity is presented, and the interplay of these phases in FeSe is discussed, focusing on bulk FeSe and the effects of physical pressure and chemical substitutions as tuning parameters.

Orbital Selectivity in Electron Correlations and Superconducting Pairing of Iron-Based Superconductors

Electron correlations play a central role in iron-based superconductors. In these systems, multiple Fe 3 d -orbitals are active in the low-energy physics, and they are not all degenerate. For these

The Role of Orbital Nesting in the Superconductivity of Iron-Based Superconductors

We analyze the magnetic excitations and the spin-mediated superconductivity in iron-based superconductors within a low energy model that operates in the band basis, but fully incorporates the orbital

Nontrivial Role of Interlayer Cation States in Iron-Based Superconductors.

This work establishes that superconductivity in iron germanides is suppressed by strong ferromagnetic tendencies, which surprisingly do not originate from changes in bond angles or bond distances with respect to iron pnictides and chalcogenides, but are due to changes in the electronic structure in a wide range of energies happening upon substitution of atom species.

Intertwined spin-orbital coupled orders in the iron-based superconductors

The underdoped phase diagram of the iron-based superconductors exemplifies the complexity common to many correlated materials. Indeed, multiple ordered states that break different symmetries but

Orbital selective pairing and gap structures of iron-based superconductors

We discuss the influence on spin-fluctuation pairing theory of orbital selective strong correlation effects in Fe-based superconductors, particularly Fe chalcogenide systems. We propose that a key

Role of the orbital degree of freedom in iron-based superconductors

Almost a decade has passed since the serendipitous discovery of the iron-based high temperature superconductors (FeSCs) in 2008. The fact that, as in the copper oxide high temperature

Heavy fermions and Hund's metals in iron-based superconductors

Materials where the electrons responsible for the low-energy properties experience strong correlations are today very investigated in search of emerging new phases with surprising and/or useful

Spin dynamics of the block orbital-selective Mott phase

Theoretical prediction for the dynamical spin structure factor within a block-OSMP regime using the density-matrix renormalization-group method finds two dominant features: low-energy dispersive and high- energy dispersionless modes.



Unified picture for magnetic correlations in iron-based superconductors.

The results reveal the crucial role of Hund's rule coupling for the strongly correlated nature of the system and suggest that the iron-based superconductors are closer kin to manganites than cuprates in terms of their diverse magnetism and incoherent normal-state electron transport.

Enhancement of magnetic stripe order in iron-pnictide superconductors from the interaction between conduction electrons and magnetic impurities.

It is shown how the experimental findings can be explained by a cooperative behavior of the magnetic impurities and the conduction electrons mediating the Ruderman-Kittel-Kasuya-Yosida interactions between them.

Phase diagram and gap anisotropy in iron-pnictide superconductors

Using the fluctuation-exchange approximation, we study an effective five-band Hubbard model for ironpnictide superconductors obtained from the first-principles band structure. We preclude

Magnetism, superconductivity, and pairing symmetry in iron-based superconductors

We analyze antiferromagnetism and superconductivity in novel Fe-based superconductors within the itinerant model of small electron and hole pockets near 0,0 and ,. We argue that the effective

Interplay of magnetic and structural transitions in iron-based pnictide superconductors

The interplay between the structural and magnetic phase transitions occurring in the Fe-based pnictide superconductors is studied within a Ginzburg-Landau approach. We show that the magnetoelastic

Magnetic interactions in iron superconductors studied with a five-orbital model within the Hartree-Fock and Heisenberg approximations

We have analyzed the magnetic interactions of a five orbital model for iron superconductors treated both within Hartree-Fock and Heisenberg approximations. We have found that the exchange constants

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,

Multiband magnetism and superconductivity in Fe-based compounds

Recent discovery of superconductivity in Fe-based layered compounds may have opened a new pathway to the room temperature superconductivity. A model Hamiltonian describing FeAs layers is introduced,

Kinetic frustration and the nature of the magnetic and paramagnetic states in iron pnictides and iron chalcogenides.

A comparative theoretical study of a large number of iron-based compounds in both their magnetic and paramagnetic states is carried out, tracing variation in physical properties to variations in the key structural parameters, rather than changes in the screening of the Coulomb interactions.

Chalcogen-height dependent magnetic interactions and magnetic order switching in FeSexTe1-x.

A comprehensive and unified view on the magnetism in FeSexTe1-x and iron pnictide superconductors is provided, demonstrating a linear temperature dependence of the macroscopic magnetic susceptibility in the single- Stripe phase in contrast with the constant behavior in the double-stripe phase.