Ising and Spin orders in Iron-based Superconductors

Abstract

Motivated by recent neutron scattering experiments, we study the ordering of spins in the iron-based superconductors La(O_{1-x}F_x)FeAs, assuming them in proximity to a Mott insulator in the phase diagram. The ground state of the parent system with x = 0 is a spin density wave with ordering wave vector Q = (0, π) or (π, 0). Upon raising the temperature, we find the system to restore SU(2) symmetry, while an Ising symmetry remains broken, explaining the experimentally observed lattice distortion to a monoclinic crystal structure. Upon further temperature increase, the spins finally disorder at a second transition. The phase transition driven by doping with charge carriers similarly splits into an O(3) transition, and an Ising transition with z = 3 at larger doping.

4.5 pages, 2 figures

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• Quantum Phase Transition between Z2 spin liquid and columnar Valence Bond Crystals on a Triangular lattice
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• Orbital Nematic Order and Interplay with Magnetism in the Two-Orbital Hubbard Model
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• Electron Correlation and Spin Dynamics in Iron Pnictides and Chalcogenides
• Isotropic Quenched Disorder Triggers a Robust Nematic State in Electron-Doped Pnictides
• Superconductivity by Hidden Spin Fluctuations in Electron-Doped Iron Selenide
• Spin Resonances in Iron-Selenide High-Tc Superconductors by Proximity to Hidden Spin Density Wave
• Raman scattering as a probe of charge nematic fluctuations in iron based superconductors
• Nematic Fluctuations in an Orbital Selective Superconductor Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$
• Anisotropic magnetoelastic coupling in single-crystalline CeFeAsO as seen via high-resolution x-ray diffraction
• Crossover Behavior from Decoupled Criticality
• Magnetic and Ising quantum phase transitions in a model for isoelectronically tuned iron pnictides
• Study of antiferromagnetic and nematic phase transitions in $BaF{e}_2(A{s}_{1-x}{P}_x{)}_2$ by AC micro-calorimetry and SQUID magnetometry
• Potential Lifshitz transition at optimal substitution in nematic pnictide Ba${}_{1-x}$Sr${}_x$Ni${}_2$As${}_2$
• Role of Fermi surface for the pressure-tuned nematic transition in the BaFe${}_2$As${}_2$ family
• Smeared nematic quantum phase transitions due to rare-region effects in inhomogeneous systems
• Is the nature of magnetic order in copper-oxides and in iron-pnictides different?
• Quasiparticle scattering interference in iron pnictides: A probe of the origin of nematicity
• Finite temperature and pressure molecular dynamics for BaFe2As2
• Raman scattering study of tetragonal magnetic phase in Sr${}_{1-x}$Na${}_x$Fe${}_2$As${}_2$: structural symmetry and electronic gap
• Tuning the magnetic and structural phase transitions of PrFeAsO via Fe/Ru spin dilution
• Nature of the Antiferromagnetic and Nematic Transitions in Sr${}_{1-x}$Ba${}_x$Fe${}_{1.97}$Ni${}_{0.03}$As${}_2$
• Strain-induced spin-nematic state and nematic susceptibility arising from $2\times 2$ Fe clusters in KFe${}_{0.8}$Ag${}_{1.2}$Te${}_2$
• Ising nematic fluid phase of hard-core dimers on the square lattice
• Nematicity in LaFeAsO${}_{1-x}$F${}_x$
• Orbital Resonance Mode in Superconducting Iron Pnictides
• Direct observation of spin excitation anisotropy in the paramagnetic orthorhombic state of BaFe${}_{2-x}$Ni${}_x$As${}_2$
• Anisotropic magnetic excitations of a frustrated bilinear-biquadratic spin model -- Implications for spin waves of detwinned iron pnictides
• Impact of the first order antiferromagnetic phase transition on the paramagnetic spin excitations and nematic phase of SrFe${}_2$As${}_2$
• Electronic origin of structural transition in 122 Fe based superconductors
• Magnetic and Quasiparticle Excitation Spectra of an Itinerant $J_1-J_2$ Model for Iron Pnictide Superconductors
• Identifying the dominant pairing interaction in high-$T_c$ FeSe superconductors through Leggett modes
• Electronic and magnetic properties of orthorhombic iron selenide (FeSe)
• High impact of spin-nematic order on the lattice domains in thin films of iron-based superconductors
• Random-strain-induced correlations in materials with intertwined nematic and magnetic orders
• Uniaxial stress effect on the electronic structure of quantum materials
• Orbital order from the on-site orbital attraction
• Theory of Magnetic Fluctuations in Iron Pnictides
• Theories for charge-driven nematicity in kagome metals
• Interplay between Magnetic and Vestigial Nematic Orders in the Layered $J_1$-$J_2$ Classical Heisenberg Model
• Incommensurate magnetic states induced by ordering competition in $\mathrm{B}{\mathrm{a}}_{1-\mathrm{x}}\mathrm{N}{\mathrm{a}}_{\mathrm{x}}\mathrm{F}{\mathrm{e}}_2\mathrm{A}{\mathrm{s}}_2$
• Quantum tricriticality in transverse Ising-like systems
• Oriented gap opening in the magnetically ordered state of Iron-pnicitides: an impact of intrinsic unit cell doubling on the $Fe$ square lattice by $As$ atoms
• Distinguishing XY from Ising Electron Nematics
• Surface Nematic Order in Iron Pnictides
• Possible Nematic Order Driven by Magnetic Fluctuations in Iron Pnictides
• Strain tuning and anisotropic spin correlations in iron-based systems
• Structural investigation of the Sm(Fe1-xRux)As(O0.85F0.15) system: a synchrotron X-ray powder diffraction study
• Breaking of four-fold lattice symmetry in a model for pnictide superconductors
• Mapping out the spin fluctuations in Co-doped LaFeAsO single crystals by NMR
• Influence of orbital nematic order on spin responses in Fe-based superconductors
• The driving mechanism of the d-wave orbital order in the iron-based superconductors
• Orbital-transverse density-wave instabilities in iron-based superconductors
• Phases of frustrated quantum antiferromagnets on the square and triangular lattices
• Evidence for negative thermal expansion in the superconducting precursor phase SmFeAsO
• Microscopic phase diagram of LaFeAsO single crystals under pressure
• A Ginzburg-Landau approach to the vortex-domain wall interaction in superconductors with nematic order
• Quantum order by disorder in Frustrated Spin Nanotubes
• Superconducting states of a J1-J2-K model for iron pnictides
• Electronic Liquid Crystal Phases in Strongly Correlated Systems
• Suppression of nematicity by tensile strain in multilayer FeSe/SrTiO${}_3$ films
• Magnon dispersion and Single hole motion in 2D frustrated antiferromagnets with four-sublattice structures
• The influence of the structural transition on magnetic fluctuations in NaFeAs
• Particle-Hole Transformation in Strongly-Doped Iron-Based Superconductors
• Theory of Quantum Phase Transition in Iron-based Superconductors with Half-Dirac Nodal Electron Fermi Surface
• Coarsening dynamics of Ising-nematic order in a frustrated Heisenberg antiferromagnet
• Magnetic excitations in the normal and nematic phases of iron pnictides
• A Short Review of the $S_4$ Symmetric Microscopic Model for Iron-Based High Temperature Superconductors
• Edwards-Anderson parameter and local Ising-nematicity in FeSe revealed via NMR spectral broadening
• Compatible Instability: Gauge Constraints of Elasticity Inherited by Electronic Nematic Criticality
• Disordered non-Fermi liquid fixed point for two-dimensional metals at Ising-nematic quantum critical points
• Strong correlation between $H$-linear magnetoresistance and strange metal in FeSe superconductor
• Electronic spin-triplet nematic with a twist
• Emergent Ising degrees of freedom above double-stripe magnetism
• Frustration-induced diffusive scattering anomaly and dimension change in $\mathrm{FeG}{\mathrm{e}}_2$
• Superconducting States and Intertwined Orders in Metallic Altermagnets