Orbital-driven nematicity in FeSe

Abstract

A very fundamental and unconventional characteristic of superconductivity in iron-based materials is that it occurs in the vicinity of {\it two} other instabilities. Apart from a tendency towards magnetic order, these Fe-based systems have a propensity for nematic ordering: a lowering of the rotational symmetry while time-reversal invariance is preserved. Setting the stage for superconductivity, it is heavily debated whether the nematic symmetry breaking is driven by lattice, orbital or spin degrees of freedom. Here we report a very clear splitting of NMR resonance lines in FeSe at $T_{nem}$ = 91K, far above superconducting $T_c$ of 9.3 K. The splitting occurs for magnetic fields perpendicular to the Fe-planes and has the temperature dependence of a Landau-type order-parameter. Spin-lattice relaxation rates are not affected at $T_{nem}$, which unequivocally establishes orbital degrees of freedom as driving the nematic order. We demonstrate that superconductivity competes with the emerging nematicity.

4 figures; supplementary material is included; Final version, Nature Materials, advance online publication, 10 Nov 2014

References in corpus (24)

• High-temperature superconductivity in iron-based materials
• Interface induced high temperature superconductivity in single unit-cell FeSe films on SrTiO3
• Nematic order in iron superconductors - who is in the driver's seat?
• Superconductivity at 36 K in beta-Fe1.01Se with the compression of the interlayer separation under pressure
• Phase Diagram and High Temperature Superconductivity at 65 K in Tuning Carrier Concentration of Single-Layer FeSe Films
• Interface-induced superconductivity and strain-dependent spin density wave in FeSe/SrTiO3 thin films
• Theory of Electron Nematic Order in LaOFeAs
• Divergent nematic susceptibility in an iron arsenide superconductor
• Symmetry breaking orbital anisotropy on detwinned Ba(Fe1-xCox)2As2 above the spin density wave transition
• The Structural Phase Transition in FeSe (Fe1+dSe)
• Why Does Undoped FeSe Become A High Tc Superconductor Under Pressure?
• Ferro-Orbital Order and Strong Magnetic Anisotropy in the Parent Compounds of Iron-Pnictide Superconductors
• Spin-orbital frustrations and anomalous metallic state in iron-pnictide superconductors
• Crystal structure of the new FeSe1-x superconductor
• Direct observation of high temperature superconductivity in one-unit-cell FeSe films
• Orbital-Ordering Induces Structural Phase Transition and the Resistivity Anomaly in Iron Pnictides
• Lack of coupling between superconductivity and orthorhombic distortion in stoichiometric single-crystalline FeSe
• Orbital Order and Spontaneous Orthorhombicity in Iron Pnictides
• Nematic susceptibility of hole- and electron-doped BaFe2As2 iron-based superconductors from shear modulus measurements
• NMR Search for the Spin Nematic State in LaFeAsO Single Crystal
• Superconductivity in the PbO-type Structure alpha-FeSe
• Orbital-weight redistribution triggered by spin order in the pnictides
• Non-analytic spin susceptibility of a nested Fermi liquid: the case of Fe-based pnictides
• Contrasts in electron correlations and inelastic scattering between LiFeAs and LiFeP revealed by charge transport

Cited by in corpus (266)

• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• High Temperature Superconductivity in Iron Pnictides and Chalcogenides
• Iron-Based Superconductors: current status of materials and pairing mechanism
• Emergence of the nematic electronic state in FeSe
• Effect of magnetic frustration on nematicity and superconductivity in Fe chalcogenides
• Dome-shaped magnetic order competing with high-temperature superconductivity at high pressures in FeSe
• Ironing out the details of unconventional superconductivity
• Strong Interplay between Stripe Spin Fluctuations, Nematicity and Superconductivity in FeSe
• Origin of the tetragonal-to-orthorhombic (nematic) phase transition in FeSe: a combined thermodynamic and NMR study
• Nematicity and quantum paramagnetism in FeSe
• Nematic quantum critical point without magnetism in FeSe1-xSx superconductors
• Nematicity, magnetism and superconductivity in FeSe
• Using Gap Symmetry and Structure to Reveal the Pairing Mechanism in Fe-based Superconductors
• Observation of two distinct $d_{xz}/d_{yz}$ band splittings in FeSe
• Low-energy microscopic models for iron-based superconductors: a review
• Antiferroquadrupolar and Ising-Nematic Orders of a Frustrated Bilinear-Biquadratic Heisenberg Model and Implications for the Magnetism of FeSe
• Strong cooperative coupling of pressure-induced magnetic order and nematicity in FeSe
• Magnetism, superconductivity, and spontaneous orbital order in iron-based superconductors: who comes first and why?
• On the Remarkable Superconductivity of FeSe and its Close Cousins
• Exotic Superconducting States in FeSe-based Materials
• Giant superconducting fluctuations in the compensated semimetal FeSe at the BCS-BEC crossover
• Origin of the Resistivity Anisotropy in the Nematic Phase of FeSe
• Maximizing Tc by tuning nematicity and magnetism in FeSe1-xSx superconductors
• Evidence for unidirectional nematic bond ordering in FeSe
• The origin of nematic order in FeSe
• Orbital-dependent Fermi Surface shrinking as a fingerprint of nematicity in FeSe
• Charge Nematicity and Electronic Raman Scattering in Iron-based Superconductors
• Electronic in-plane symmetry breaking at field-tuned quantum criticality in CeRhIn5
• Electronic nematic susceptibility of iron-based superconductors
• Nematicity and magnetism in FeSe and other families of Fe-based superconductors
• Charge induced nematicity in FeSe
• Strong $(\pi ,0)$ spin fluctuations in $\beta$-FeSe observed by neutron spectroscopy
• Pressure-induced antiferromagnetic transition and phase diagram in FeSe
• Evidence for an FFLO state with segmented vortices in the BCS-BEC-crossover superconductor FeSe
• Possible star-of-David pattern charge density wave with additional modulation in the kagome superconductor CsV${}_3$Sb${}_5$
• Sign-reversing orbital polarization in the nematic phase of FeSe due to the $C_2$ symmetry-breaking in the self-energy
• Distinctive momentum dependence of the band reconstruction in the nematic state of FeSe thin film
• Highly Anisotropic Superconducting Gap in Nematically Ordered and Tetragonal Phases of FeSe${}_{1-x}$S${}_x$
• Theory of Cross Phenomena and Their Coefficients Beyond Onsager Theorem
• Spin fluctuations in iron pnictides and chalcogenides: From antiferromagnetism to superconductivity
• Interatomic Coulomb interaction and electron nematic bond order in FeSe
• Anisotropic spin fluctuations in detwinned FeSe
• Pressure Induced Stripe-order Antiferromagnetism and First-order Phase Transition in FeSe
• Critical Quadrupole Fluctuations and Collective Modes in Iron Pnictide Superconductors
• Nematic fluctuations and the magneto-structural phase transition in $\mathrm{Ba}(\mathrm{F}{\mathrm{e}}_{1-\mathrm{x}}\mathrm{C}{\mathrm{o}}_{\mathrm{x}}{)}_2\mathrm{A}{\mathrm{s}}_2$
• Electron carriers with possible Dirac-cone-like dispersion in FeSe${}_{1-x}$S${}_x$ ($x$ = 0 and 0.14) single crystals triggered by structural transition
• Evidence for time-reversal symmetry breaking of the superconducting state near twin-boundary interfaces in FeSe
• Model of Electronic Structure and Superconductivity in Orbitally Ordered FeSe
• Nanoscale decoupling of electronic nematicity and structural anisotropy in FeSe thin films
• Anomalous magnetoresistance in the spinel superconductor LiTi2O4
• Preformed Cooper pairs in layered FeSe-based superconductors
• Hybridized quadrupolar excitations in the spin-anisotropic frustrated magnet FeI2
• Effects of strain on the electronic structure, superconductivity, and nematicity in FeSe studied by angle-resolved photoemission spectroscopy
• Structural transition and superconductivity in hydrothermally synthesized FeX (X = S, Se)
• Momentum Dependence of the Nematic Order Parameter in Iron-Based Superconductors
• Local orbital degeneracy lifting as a precursor to an orbital-selective Peierls transition
• Signature of the Leggett mode in the A1g Raman response: from MgB2 to iron-based superconductors
• The phase diagrams of iron-based superconductors: theory and experiments
• Orbital Origin of Extremely Anisotropic Superconducting Gap in Nematic Phase of FeSe Superconductor
• Uniaxial strain control of spin-polarization in multicomponent nematic order of BaFe${}_2$As${}_2$
• Correlation between Superconductivity and Magnetic Fluctuations in Fe(Se1-xSx) Revealed by 77Se NMR
• Coexistence of orbital and quantum critical magnetoresistance in FeSe${}_{1-x}$S${}_x$
• 20 K superconductivity in heavily electron doped surface layer of FeSe bulk crystal
• Observation of Dirac Cone Band Dispersion in FeSe Thin Films by Photoemission Spectroscopy
• Dome of magnetic order inside the nematic phase of sulfur-substituted FeSe under pressure
• Evidence of nematic order and nodal superconducting gap along [110] direction in RbFe2As2
• Spin excitations in a model of FeSe with orbital ordering
• Strain-tuning of nematicity and superconductivity in single crystals of FeSe
• Emergence of an incipient ordering mode in FeSe
• Coulomb correlations intertwined with spin and orbital excitations in LaCoO${}_3$
• Fermi surface reconstruction in FeSe under high pressure
• Altermagnetism and superconductivity in a multiorbital t-J model
• Elastic coupling and spin-driven nematicity in iron-based superconductors
• Interplay between magnetism, superconductivity, and orbital order in a 5-pocket model for iron-based superconductors - a parquet renormalization group study
• Lifted electron pocket and reversed orbital occupancy imbalance in FeSe
• NMR evidence for inhomogeneous nematic fluctuations in BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Metamorphoses of electronic structure of FeSe-based superconductors (Review article)
• Prominent role of spin-orbit coupling in FeSe
• Competing instabilities, orbital ordering and splitting of band degeneracies from a parquet renormalization group analysis of a 4-pocket model for iron-based superconductors: application to FeSe
• Unveiling the hidden nematicity and spin subsystem in FeSe
• Impact of Uniaxial Pressure on Structural and Magnetic Phase Transitions in Electron-Doped Iron Pnictides
• NMR evidence for static local nematicity and its cooperative interplay with low-energy magnetic fluctuations in FeSe under pressure
• Coexistence of low moment magnetism and superconductivity in tetragonal FeS and suppression of $T_{\mathrm{c}}$ under pressure
• Interplay of nematic and magnetic orders in FeSe under pressure
• Superconductivity and Nematic Fluctuations in a model of FeSe monolayers: A Determinant Quantum Monte Carlo Study
• Pressure induced superconductivity in MnSe
• Spin-excitation anisotropy in the nematic state of detwinned FeSe
• The relationship between transport anisotropy and nematicity in FeSe
• Non-Fermi liquid transport in the vicinity of nematic quantum critical point of FeSe${}_{1-x}$S${}_x$ superconductor
• Orbital Order and Spin Nematicity in the Tetragonal Phase of Electron-doped Iron-Pnictides NaFe${}_{1-x}$Co${}_x$As
• Spin-Driven Nematic Instability of the Multi-Orbital Hubbard Model: Application to Iron-Based Superconductors
• Evidence for short-range magnetic order in the nematic phase of FeSe from anisotropic in-plane magnetostriction and susceptibility measurements
• Hydrostatic and uniaxial pressure tuning of iron-based superconductors: Insights into superconductivity, magnetism, nematicity and collapsed tetragonal transitions
• Nematicity, magnetism and superconductivity in FeSe under pressure: Unified explanation based on the self-consistent vertex correction theory
• The form and the origin of the orbital ordering in the electronic nematic phase of the Iron-based superconductors
• Resistivity and magnetoresistance of FeSe single crystals under Helium-gas pressure
• Room temperature local nematicity in FeSe superconductor
• Spin Ferroquadrupolar Order in the Nematic Phase of FeSe
• Incommensurate smectic phase in close proximity to the high-Tc superconductor FeSe/SrTiO3
• Spin-orbital interplay and topology in the nematic phase of iron pnictides
• Highly anisotropic superconducting gaps and possible evidence of antiferromagnetic order in FeSe single crystals
• Manifestation of nematic degrees of freedom in the Raman response function of iron pnictides
• Phonon anomalies in FeS
• Magnetotransport study of the pressure-induced antiferromagnetic phase in FeSe
• Orbital mismatch boosting nematic instability in iron-based superconductors
• Effect of electron correlations on the electronic structure and phase stability of FeSe upon lattice expansion
• Generalized liquid crystals: giant fluctuations and the vestigial chiral order of $I$, $O$ and $T$ matter
• Superconductivity-induced nematicity
• Time-reversal symmetry-breaking nematic superconductivity in FeSe
• Superconductivity without hole-pocket in electron-doped FeSe: Analysis beyond the Migdal-Eliashberg formalism
• Nematicity and in-plane anisotropy of superconductivity in $\beta$-FeSe detected by ${}^{77}$Se nuclear magnetic resonance
• Quantitative characterization of short-range orthorhombic fluctuations in FeSe through pair distribution function analysis
• Superconductivity-enhanced Nematicity and '$s+d$' Gap Symmetry in Fe(Se${}_{1-x}$S${}_x$)
• Pseudogap Behavior of the Nuclear Spin-lattice Relaxation Rate in FeSe Probed by ${}^{77}$Se-NMR
• Collapse of critical nematic fluctuations in FeSe under pressure
• Bulk superconductivity and role of fluctuations in the iron-based superconductor FeSe at high pressures
• Charge-Stripe Order in a Parent Compound of Iron-based Superconductors
• Separate tuning of nematicity and spin fluctuations to unravel the origin of superconductivity in FeSe
• Hydrothermal synthesis and complete phase diagram of FeSe${}_{1-x}$S${}_x$ $(0\le x\le 1)$ single crystals
• Phase-sensitive evidence for the sign-reversal s+- symmetry of the order parameter in an iron-pnictide superconductor using Nb/Ba1-xNaxFe2As2 Josephson junctions
• Observation of the in-plane magnetic field-induced phase transitions in FeSe
• Imaging anisotropic vortex dynamics in FeSe
• Argument on superconductivity pairing mechanism from cobalt impurity doping in FeSe: spin ($s_{\pm }$) or orbital ($s_{++}$) fluctuation
• Frustrated spin order and stripe fluctuations in FeSe
• Effect of nematic order on the low-energy spin fluctuations in detwinned BaFe${}_{1.935}$Ni${}_{0.065}$As${}_2$
• Possible Nematic Spin Liquid in Spin-$1$ Antiferromagnetic System on the Square Lattice: Implication for the Nematic Paramagnetic State of FeSe
• Spin-Orbital-Intertwined Nematic State in FeSe
• Robust short-range-ordered nematicity in FeSe evidenced by high-pressure NMR
• Weakening of the diamagnetic shielding in FeSe${}_{1-x}$S${}_x$ at high pressures
• Close proximity of FeSe to a magnetic quantum critical point as revealed by high-resolution $\mu$SR measurements
• Quasiparticle Excitations in the Superconducting State of FeSe Probed by Thermal Hall Conductivity in the Vicinity of the BCS-BEC Crossover
• Nematicity from mixed S_{+-} + d_{x^2-y^2} states in iron-based superconductors
• Evolution of the nematic susceptibility in LaFe${}_{1-x}$Co${}_x$AsO
• Tunable Emergent Heterostructures in a Prototypical Correlated Metal
• Singular magnetic anisotropy in the nematic phase of FeSe
• Disordered hyperuniform vortex matter with rhombic distortions in FeSe at low fields
• Spontaneous orbital polarization in the nematic phase of FeSe
• Mechanism for nematic superconductivity in FeSe
• Interplay of lattice, electronic and spin degrees of freedom in detwinned BaFe${}_2$As${}_2$: a Raman scattering study
• Nematic correlation length in iron-based superconductors probed by inelastic x-ray scattering
• Photoinduced ultrafast dynamics of local nematicity and lattice distortions in FeSe crystals
• Interplay between superconductivity and itinerant magnetism in underdoped Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ ($x=$ 0.2) probed by the response to controlled point-like disorder
• Thermoelectric anisotropy in Ba(Fe1-xCox)2As2 iron-based superconductor
• Antiferroquadrupolar order and rotational symmetry breaking in a generalized bilinear-biquadratic model on a square lattice
• Electronic transport properties and hydrostatic pressure effect of FeSe${}_{0.67}$Te${}_{0.33}$ single crystals free of phase separation
• Charge and nematic orders in AFe${}_2$As${}_2$ (A= Rb,Cs) superconductors
• Magnetic tricritical point and nematicity in FeSe under pressure
• Second order Zeeman interaction and ferroquadrupolar order in TmVO${}_4$
• Mutual independence of critical temperature and superfluid density under pressure in optimally electron-doped superconducting LaFeAsO${}_{1-x}$F${}_x$
• Enhanced superconducting transition temperature in hyper-interlayer-expanded FeSe despite the suppressed electronic nematic order and spin fluctuations
• Visualization of local magnetic moments emerging from impurities in the Hund's metal states of FeSe
• Spin excitations and the Fermi surface of superconducting FeS
• Intertwined spin-orbital coupled orders in the iron-based superconductors
• Thermal evolution of antiferromagnetic correlations and tetrahedral bond angles in superconducting FeTe${}_{1-x}$Se${}_x$
• Energy scale of nematic ordering in the parent iron-based superconductor:BaFe2As2
• Synthesis, phase stability, structural and physical properties of 11-type iron chalcogenides
• Superconducting FeSe monolayer with milli-electron volt Fermi energy
• Influence of disorder on the signature of pseudogap and multigap superconducting behavior in FeSe
• Theoretical Prediction of the Nematic Orbital-Ordered State in Ti-Oxypnictide Superconductor BaTi2(As,Sb)2O
• Reemergeing electronic nematicity in heavily hole-doped Fe-based superconductors
• Iron-based superconductors: tales from the nuclei
• Orientational order parameters for arbitrary quantum systems
• Band structure reconstruction across nematic order in high quality FeSe single crystal as revealed by optical spectroscopy study
• Origin of doping-induced suppression and reemergence of magnetism in LaFeAsO${}_{1-x}$H${}_x$
• Electronic structures of doped BaFe${}_2$As${}_2$ materials: virtual crystal approximation versus super-cell approach
• Phase stability and large in-plane resistivity in the 112-type iron-based superconductor Ca${}_{1-x}$La${}_x$FeAs${}_2$
• Anisotropic nematic fluctuations above the ferroquadrupolar transition in TmVO${}_4$
• Electronic structure properties in the nematic phases of FeSe
• Nematic Fluctuations and Phase Transitions in LaFeAsO: a Raman Scattering Study
• Dynamic spin-lattice coupling and nematic fluctuations in NaFeAs
• On the phonon dispersion relation of single-crystalline $\beta$--FeSe
• Emergent high-spin state above 7 GPa in superconducting FeSe
• Orbital Symmetry and Orbital Excitations in High-$T_c$ Superconductors
• Observation of Ising spin-nematic order and its close relationship to the superconductivity in FeSe single crystals
• Experimental evidence of $T_c$ enhancement without the influence of spin fluctuations: NMR study on LaFeAsO_{1-x}H_x under a pressure of 3.0 GPa
• Ising-nematic order in the bilinear-biquadratic model for the iron pnictides
• ${}^{77}$Se-NMR Study under Pressure on 12%-S Doped FeSe
• Pressure-induced reconstitution of Fermi surfaces and spin fluctuations in S-substituted FeSe
• Structural-transition-induced quasi two-dimensional Fermi surface in FeSe
• Spin fluctuations from Bogoliubov Fermi surfaces in the superconducting state of S-substituted FeSe
• Nematic magnetoelastic effect contrasted between Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ and FeSe
• Structure of the pairing gap from orbital nematic fluctuations
• Fluctuations and pairing in Fe-based superconductors: Light scattering experiments
• Orbital Nematic Order and Interplay with Magnetism in the Two-Orbital Hubbard Model
• Nematicity and magnetism in LaFeAsO single crystals probed by ${}^{75}$As nuclear magnetic resonance
• Inhomogeneous Knight shift in vortex cores of superconducting FeSe
• Anisotropic quasiparticle coherence in nematic BaFe${}_2$As${}_2$ studied with strain-dependent ARPES
• 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
• Nematic state of the FeSe superconductor
• Microscopic evidence for the intra-unit-cell electronic nematicity inside the pseudogap phase in YBa${}_2$Cu${}_4$O${}_8$
• Evidence for a two-fold symmetric superconducting gap in a monolayer of FeSe${}_{0.5}$Te${}_{0.5}$ on a topological insulator
• Pressure effect on superconductivity in FeSe0.5Te0.5
• Quadrupolar charge dynamics in the nonmagnetic FeSe${}_{1-x}$S${}_x$ superconductors
• Nematic transition and highly two-dimensional superconductivity in BaTi${}_2$Bi${}_2$O revealed by ${}^{209}$Bi-nuclear magnetic resonance/nuclear quadrupole resonance measurements
• Observation of orbital ordering and origin of the nematic order in FeSe
• Fermi surface, pressure-induced antiferromagnetic order, and superconductivity in FeSe
• 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
• Nematic Fluctuations in an Orbital Selective Superconductor Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$
• Structural phase diagram of LaO1-xFxBiSSe: suppression of the structural phase transition by partial F substitutions
• Role of Sn impurity on electronic topological transitions in 122 Fe-based superconductors
• Strong enhancement of magnetic order from bulk to stretched monolayer FeSe as Hund's metals
• Tuning the interplay between nematicity and spin fluctuations in Na${}_{1-x}$Li${}_x$FeAs superconductors
• Quasi-one Dimensional Nanostructures as Sign of Nematicity in Iron Pnictides and Chalcogenides
• Nodal superconductivity coexists with low-moment static magnetism in single-crystalline tetragonal FeS: A muon spin relaxation and rotation study
• Suppression of Superconductivity and Nematic Order in Fe${}_{1-y}$Se${}_{1-x}$S${}_x$ (0$\le$$x$$\le$1, $y$$\le$0.1) Crystals by Anion Height Disorder
• Nematicity in LaFeAsO${}_{1-x}$F${}_x$
• The Hidden Nematic Fluctuations in the Triclinic (Ca0.85La0.15)10(Pt3As8)(Fe2As2)5 Superconductor Revealed by Ultrafast Optical Spectroscopy
• Charge carrier dynamics of FeSe thin film investigated by terahertz magneto-optical spectroscopy
• Anisotropy of the DC conductivity due to orbital-selective spin fluctuations in the nematic phase of iron superconductors
• Nematicity, magnetic fluctuation and ferro-spin-orbital ordering in BaFe${}_2$As${}_2$ family
• Revealing the hidden order in BaTi2As2O via nuclear magnetic resonance
• Semimetallic spin-density wave state in iron pnictides
• Observation of a C-type short range antiferromagnetic order in expanded FeS
• Identifying the dominant pairing interaction in high-$T_c$ FeSe superconductors through Leggett modes
• Nematic properties of FeSe${}_{1-x}$Te${}_x$ crystals with a low Te content
• Unexpected Enhancement of Three-Dimensional Low-Energy Spin Correlations in Quasi-Two-Dimensional Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$ System at High Temperature
• Superconductivity of highly spin-polarized electrons in FeSe probed by ${}^{77}$Se NMR
• Unconventional Multi-gap Superconductivity and Antiferromagnetic Spin Fluctuations in New Iron-arsenide LaFe2As2 in Heavily Electron-doped Regime
• Electronic and magnetic properties of orthorhombic iron selenide (FeSe)
• Putative hybridization gap in CaMn${}_2$Bi${}_2$ under applied pressure
• Unconventional non-Fermi liquid state caused by nematic criticality in cuprates
• Nematic fluctuations in the non-superconducting iron pnictide BaFe${}_{1.9-x}$Ni${}_{0.1}$Cr${}_x$As${}_2$
• Sulfur-induced magnetism in FeSe${}_{1-x}$S${}_x$ thin films on LaAlO${}_3$ revealed by muon spin rotation/relaxation
• Phase transitions in a frustrated biquadratic Heisenberg model with coupled orbital degree of freedom for iron-based superconductors
• Orbital order from the on-site orbital attraction
• Observation of the novel type of ordering: Spontaneous ferriquadrupolar order
• Superconductivity and phonon self-energy effects in Fe${}_{1+y}$Te${}_{0.6}$Se${}_{0.4}$
• Mapping out the spin fluctuations in Co-doped LaFeAsO single crystals by NMR
• Unusual band splitting and superconducting gap evolution with sulfur substitution in FeSe
• Influence of orbital nematic order on spin responses in Fe-based superconductors
• Interband scattering- and nematicity-induced quantum oscillation frequency in FeSe
• The driving mechanism of the d-wave orbital order in the iron-based superconductors
• Inverse melting and intertwined orders in PrCuSb${}_2$
• Persistence of Ising-like easy-axis spin correlations in the paramagnetic state of the spin-1 chain compound NiTe${}_2$O${}_5$
• Ferromagnetic inter-layer coupling in FeSe${}_{1-x}$S${}_x$ superconductors revealed by inelastic neutron scattering
• Electronic structure of the quadrupolar ordered heavy-fermion compound YbRu2Ge2 measured by angle-resolved photoemission
• Two-step phase transitions in Fe(Se,Te)
• Suppression of nematicity by tensile strain in multilayer FeSe/SrTiO${}_3$ films
• Superconducting states of a J1-J2-K model for iron pnictides
• Crystalline anisotropy induces a second antiferromagnetic phase in the absence of SDW in the heavily hydrogen-doped LaFeAsO${}_{1-x}$H${}_x$ $(x\sim 0.5)$
• Electronically driven nematicity in FeSe Films on SrTiO3
• Measurements of nematic susceptibility with phase sensitive nuclear magnetic resonance in pulsed strain fields
• Acoustic lattice instabilities at the magneto-structural transition in Fe${}_{1.057(7)}$Te
• 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
• Introduction to High-Temperature Superconductivity for Solid State Chemists
• Atomic-scale imaging of electronic nematicity in ferropnictides
• Detecting the orbital character of the spin fluctuation in the Iron-based superconductors with the resonant inelastic X-ray scattering spectroscopy
• Dynamics of orbital degrees of freedom probed via isotope ${}^{121,123}$ Sb nuclear quadrupole moments in Sb-substituted iron-pnictide superconductors
• Superconductivity near an Ising nematic quantum critical point in two dimensions
• Microscopic Description of Unconventional Nodal Superconductivity in FeSe
• Symmetry-breaking-induced topology in FeSe
• Stripe Antiferromagnetic Ground-State Configuration of FeSe Revealed by Density Functional Theory
• Feedback of non-local $d_{xy}$ nematicity on the magnetic anisotropy in FeSe
• Nematicity in LaFeAsO single crystals studied by elastoresistance, high-resolution thermal expansion and shear-modulus measurements
• Quasiparticle interaction originating from Bogoliubov Fermi Surfaces under pressure in 18%-S substituted FeSe studied via NMR
• Short-lived electron excitations in $\mathrm{FeT}{\mathrm{e}}_{1-\mathrm{x}}\mathrm{S}{\mathrm{e}}_{\mathrm{x}}$ as revealed by microwave absorption
• Multi-band D-TRILEX approach to materials with strong electronic correlations
• Topological Semimetal KAlGe with Novel Electronic Instability
• Fe-vacancy ordered Fe4Se5: The insulating parent phase of FeSe superconductor
• Eliminating Orbital Selectivity from the Metal-Insulator Transition by Strong Magnetic Fluctuations
• Specific Heat and the gap structure of a Nematic Superconductor, application to FeSe
• Fragile pressure-induced magnetism in FeSe superconductors with a thickness reduction
• Orbital-lattice coupling and orbital ordering instability in iron pnictides
• Resistivity anisotropy from the multiorbital Boltzmann equation in nematic FeSe