Nematicity, magnetism and superconductivity in FeSe

Abstract

Iron-based superconductors are well known for their complex interplay between structure, magnetism and superconductivity. FeSe offers a particularly fascinating example. This material has been intensely discussed because of its extended nematic phase, whose relationship with magnetism is not obvious. Superconductivity in FeSe is highly tunable, with the superconducting transition temperature, $T_{\mathrm{c}}$, ranging from 8 K in bulk single crystals at ambient pressure to almost 40 K under pressure or in intercalated systems, and to even higher temperatures in thin films. In this topical review, we present an overview of nematicity, magnetism and superconductivity, and discuss the interplay of these phases in FeSe. We focus on bulk FeSe and the effects of physical pressure and chemical substitutions as tuning parameters. The experimental results are discussed in the context of the well-studied iron-pnictide superconductors and interpretations from theoretical approaches are presented.

arXiv commentTopical Review submitted to Journal of Physics: Condensed Matter

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Cited by in corpus (115)

• Exotic Superconducting States in FeSe-based Materials
• Evidence for an FFLO state with segmented vortices in the BCS-BEC-crossover superconductor FeSe
• Theory of Cross Phenomena and Their Coefficients Beyond Onsager Theorem
• Nanoscale decoupling of electronic nematicity and structural anisotropy in FeSe thin films
• Quantum vortex core and missing pseudogap in the multi-band BCS-BEC-crossover superconductor FeSe
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• DC resistivity near a nematic quantum critical point: Effects of weak disorder and acoustic phonons
• Towards exact solutions for the superconducting $T_c$ induced by electron-phonon interaction
• Pressure tuning of structural and magnetic transitions in EuAg${}_4$As${}_2$
• Dynamical susceptibility of a near-critical non-conserved order parameter and B2g Raman response in Fe-based superconductors
• Weak-coupling superconductivity in an anisotropic three-dimensional repulsive Hubbard model
• Nematicity of correlated systems driven by anisotropic chemical phase separation
• Pure nematic state in iron-based superconductor
• Positive and negative chemical pressure effects investigated in electron-doped FeSe films with an electric-double-layer structure
• Superconductivity and phase diagrams of CaK(Fe${}_{1-x}$Mn${}_x$)${}_4$As${}_4$ single crystals
• Role of nematicity in controlling spin fluctuations and superconducting Tc in bulk FeSe
• Nematic state of the FeSe superconductor
• Relationships between Superconductivity and Nematicity in FeSe${}_{1-x}$Te${}_x$ ($x=0-0.5$) Films Studied by Complex Conductivity Measurements
• Anomalous contribution to the nematic electronic states from the structural transition in FeSe revealed by time- and angle-resolved photoemission spectroscopy
• Quantum Transitions of Nematic Phases in a Spin-$1$ Bilinear-Biquadratic Model and Their Implications for FeSe
• Interplay between nematicity and Bardasis-Schrieffer modes in the short-time dynamics of unconventional superconductors
• Superconductivity and magnetic and transport properties of single-crystalline CaK(Fe${}_{1-x}$Cr${}_x$)${}_4$As${}_4$
• Nematic Fluctuations in an Orbital Selective Superconductor Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$
• Interrelationships between nematicity, antiferromagnetic spin fluctuations and superconductivity: Role of hotspots in FeSe${}_{1-x}$S${}_x$ revealed by high pressure ${}^{77}$Se NMR study
• Anisotropic effect of a magnetic field on the neutron spin resonance in FeSe
• Multipolar nematic state of nonmagnetic FeSe based on the DFT+$U$
• Lattice dynamics in FeSe via inelastic x-ray scattering and first-principles calculations
• Role of Fermi surface for the pressure-tuned nematic transition in the BaFe${}_2$As${}_2$ family
• Revisiting the phase diagram of LaFe${}_{1-x}$Co${}_x$AsO on single crystals by thermodynamic methods
• Applications for ultimate spatial resolution in LASER based $\mu$-ARPES: A FeSe case study
• Nanoscale visualization of the thermally-driven evolution of antiferromagnetic domains in FeTe thin films
• Tuning the interplay between nematicity and spin fluctuations in Na${}_{1-x}$Li${}_x$FeAs superconductors
• Laser-induced coherent control of an electronic nematic quantum phase transition
• Disorder-Induced Electronic Nematicity
• Doping effects on electronic states in electron-doped FeSe: Impact of self-energy and vertex corrections
• Nematic properties of FeSe${}_{1-x}$Te${}_x$ crystals with a low Te content
• Ab-initio investigation of lattice distortions in response to van der Waals interactions in FeSe
• Rotation of the dislocation grid in multilayer FeSe films and visualization of electronic nematic domains via orbital-selective tunneling
• Measurements of elastoresistance under pressure by combining in-situ tunable quasi-uniaxial stress with hydrostatic pressure
• Importance of Fermi surface and magnetic interactions for the superconducting dome in electron doped FeSe intercalates
• Theory of spin-excitation anisotropy in the nematic phase of FeSe obtained from RIXS measurements
• Uniaxial stress effect on the electronic structure of quantum materials
• Diverse Exotic Orders and Fermiology in Fe-based Superconductors: A Unified Mechanism for $B_{1g}/B_{2g}$ Nematicity in FeSe/(Cs,Rb)Fe${}_2$As${}_2$ and Smectic Order in BaFe${}_2$As${}_2$
• Superconductivity with Tc=7 K under pressure for Cu-, and Au-doped BaFe2As2
• Tuning Bound States of Symmetry-Breaking Vortices via Unidirectional Charge Density Wave in a Transition-Metal Dichalcogenide Superconductor
• Unusual normal and superconducting state properties observed in hydrothermal Fe1-xSe flakes
• Studies of superconductivity of Fe chalcogenides in films grown by PLD technique
• Fractional vortex array realized at twin boundary in a nematic superconductor
• Impact of atomic defects in the electronic states of FeSe${}_{1-x}$S${}_x$ superconducting crystals
• Effects of Chemical Pressure on Superconductivity in Electrochemically Intercalated (TMA)yFe2(Se1-xSx)2 (TMA = Tetramethylammonium)
• Quasiparticle scattering in a superconductor near a nematic critical point: resonance mode and multiple attractive channels
• Phase separation near the charge neutrality point in FeSe${}_{1-x}$Te${}_x$ crystals with x $<$ 0.15
• The interactions between antiferromagnetism, tetrahedral sites and electron-phonon coupling in FeSe1-xTex and FeSe/SrTiO3
• Edwards-Anderson parameter and local Ising-nematicity in FeSe revealed via NMR spectral broadening
• Strong correlation between $H$-linear magnetoresistance and strange metal in FeSe superconductor
• Orbitally resolved superconductivity in real space: FeSe
• The thermoelectric conversion efficiency problem: Insights from the electron gas thermodynamics close to a phase transition
• Feedback of non-local $d_{xy}$ nematicity on the magnetic anisotropy in FeSe
• Stripe Antiferromagnetic Ground-State Configuration of FeSe Revealed by Density Functional Theory
• Superconductivity near an Ising nematic quantum critical point in two dimensions
• Superconductivity and the quasiparticle mass enhancement near the CDW critical point using Bethe-Salpeter method: Application to cuprates
• Symmetry-breaking-induced topology in FeSe
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• Specific Heat and the gap structure of a Nematic Superconductor, application to FeSe
• Fragile pressure-induced magnetism in FeSe superconductors with a thickness reduction
• Short-lived electron excitations in $\mathrm{FeT}{\mathrm{e}}_{1-\mathrm{x}}\mathrm{S}{\mathrm{e}}_{\mathrm{x}}$ as revealed by microwave absorption