# Broken mirror symmetry, incommensurate spin correlations, and B2g nematic order in iron pnictides

@article{Wang2019BrokenMS,
title={Broken mirror symmetry, incommensurate spin correlations, and
B2g
nematic order in iron pnictides},
author={Yiming Wang and Wenjun Hu and Rong Yu and Qimiao Si},
journal={Physical Review B},
year={2019}
}
• Published 1 March 2019
• Physics
• Physical Review B
Motivated by growing indications for a distinct form of nematic correlations in the extremely hole doped iron pnictide compounds $A$Fe$_2$As$_2$ ($A$=K,Rb,Cs), we consider spin-driven nematic order in the general case of incommensurate magnetic fluctuations. We classify the nematic order parameters by broken mirror symmetries of the tetragonal $D_{4h}$ point group, and use this scheme to construct a general Ginzburg-Landau theory that links the nematic order to spatial pattern of magnetic…
14 Citations

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## References

SHOWING 1-10 OF 50 REFERENCES
Origin of diverse nematic orders in Fe-based superconductors: 45∘ rotated nematicity in AFe2As2(A=Cs,Rb)
• Physics
Physical Review B
• 2019
The origin of diverse nematicity and their order parameters in Fe-based superconductors have been attracting increasing attention. Recently, a new type of nematic order has been discovered in heavily
Possible bicollinear nematic state with monoclinic lattice distortions in iron telluride compounds
• Physics
• 2017
Iron telluride FeTe is known to display bicollinear magnetic order at low temperatures together with a monoclinic lattice distortion. Because the bicollinear order can involve two different
Double-stage nematic bond ordering above double stripe magnetism: Application to BaTi2Sb2O
• Physics, Materials Science
• 2017
Spin-driven nematicity, or the breaking of the point-group symmetry of the lattice without long-range magnetic order, is clearly quite important in iron-based superconductors. From a symmetry point
Strong interplay between stripe spin fluctuations, nematicity and superconductivity in FeSe.
• Physics
Nature materials
• 2016
The results support recent theoretical proposals that both nematicity and superconductivity are driven by spin fluctuations.
Evidence of nematic order and nodal superconducting gap along [110] direction in RbFe2As2
• Xi Liu
• Physics
Nature Communications
• 2019
A scanning tunneling microscopy study on RbFe2As2, a heavily hole-doped Fe-based superconductor (FeSC), suggests a novel (π, π) nematic phase emerging, suggesting an intimate connection between nematicity and superconducting pairing in iron-basedsuperconductors.
Theory of electron nematic order in LaFeAsO
• Physics
• 2008
We study a spin $S$ quantum Heisenberg model on the Fe lattice of the rare-earth oxypnictide superconductors. Using both large $S$ and large $N$ methods, we show that this model exhibits a sequence
Ising and Spin orders in Iron-Based Superconductors
• Materials Science, Physics
• 2008
Motivated by recent neutron scattering experiments, we study the ordering of spins in the iron-based superconductors $\mathrm{LaFeAs}({\mathrm{O}}_{1\ensuremath{-}x}{\mathrm{F}}_{x})$, assuming them
Nematic spin fluid in the tetragonal phase of BaFe$_{2}$As$_{2}$
• Physics
• 2011
We use inelastic neutron scattering to study spin waves below and above T{sub N} in iron-arsenide BaFe{sub 2}As{sub 2}. In the low-temperature orthorhombic phase, we find highly anisotropic spin
Divergent Nematic Susceptibility in an Iron Arsenide Superconductor
• Physics
Science
• 2012
Measurement of the divergent nematic susceptibility of the iron pnictide superconductor Ba(Fe1−xCox)2As2 distinguishes an electronic nematic phase transition from a simple ferroelastic distortion, and measurements indicate an Electronic nematic quantum phase transition near the composition with optimal superconducting transition temperature.
Magnetically driven suppression of nematic order in an iron-based superconductor.
• Physics, Materials Science
Nature communications
• 2014
The observation by neutron powder diffraction of an additional fourfold-symmetric phase in Ba1-xNaxFe2As2 close to the suppression of SDW order is reported, which is consistent with the predictions of magnetically driven models of nematic order.