Momentum Dependence of the Nematic Order Parameter in Iron-Based Superconductors

Abstract

The momentum dependence of the nematic order parameter is an important ingredient in the microscopic description of iron-based high-temperature superconductors. While recent reports on FeSe indicate that the nematic order parameter changes sign between electron and hole bands, detailed knowledge is still missing for other compounds. Combining angle-resolved photoemission spectroscopy (ARPES) with uniaxial strain tuning, we measure the nematic band splitting in both FeSe and BaFe${}_2$As${}_2$ without interference from either twinning or magnetic order. We find that the nematic order parameter exhibits the same momentum dependence in both compounds with a sign change between the Brillouin center and the corner. This suggests that the same microscopic mechanism drives the nematic order in spite of the very different phase diagrams.

arXiv comment7 pages, 4 figures

References in corpus (52)

• The Puzzle of High Temperature Superconductivity in Layered Iron Pnictides and Chalcogenides
• High-temperature superconductivity in iron-based materials
• Nematic order in iron superconductors - who is in the driver's seat?
• Magnetic order in BaFe2As2, the parent compound of the FeAs based superconductors in a new structural family
• Divergent nematic susceptibility in an iron arsenide superconductor
• Symmetry breaking orbital anisotropy on detwinned Ba(Fe1-xCox)2As2 above the spin density wave transition
• Determination of the phase diagram of the electron doped superconductor Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• The Structural Phase Transition in FeSe (Fe1+dSe)
• Electrical Resistivity Anisotropy from Self-Organized One-Dimensionality in High-Temperature Superconductors
• Orbital-driven nematicity in FeSe
• Emergence of the nematic electronic state in FeSe
• Effects of nematic fluctuations on the elastic properties of iron arsenide superconductors
• Ubiquitous signatures of nematic quantum criticality in optimally doped Fe-based superconductors
• Anisotropy in the electrical resistivity and susceptibility of superconducting BaFe${}_2$As${}_2$ single crystals
• Observation of Dirac Cone Electronic Dispersion in BaFe2As2
• Nematicity and quantum paramagnetism in FeSe
• Spin fluctuations and superconductivity in a 3D tight-binding model for BaFe2As2
• Piezoelectric-based apparatus for strain tuning
• Role of the orbital degree of freedom in iron-based superconductors
• Orbital-dependent modifications of electronic structure across magneto-structural transition in BaFe2As2
• Nematic susceptibility of hole- and electron-doped BaFe2As2 iron-based superconductors from shear modulus measurements
• Character of the structural and magnetic phase transitions in the parent and electron doped BaFe2As2 compounds
• Unconventional electronic reconstruction in undoped (Ba,Sr)Fe${}_2$As${}_2$ across the spin density wave transition
• Antiferroquadrupolar and Ising-Nematic Orders of a Frustrated Bilinear-Biquadratic Heisenberg Model and Implications for the Magnetism of FeSe
• Magnetism, superconductivity, and spontaneous orbital order in iron-based superconductors: who comes first and why?
• Momentum-dependent sign-inversion of orbital polarization in superconducting FeSe
• Evidence for unidirectional nematic bond ordering in FeSe
• Orbital-dependent Fermi Surface shrinking as a fingerprint of nematicity in FeSe
• Electronic in-plane symmetry breaking at field-tuned quantum criticality in CeRhIn5
• Charge induced nematicity in FeSe
• Nesting between hole and electron pockets in Ba(Fe1-xCox)2As2 (x=0-0.3) observed with angle-resolved photoemission
• 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
• The orbital characters of bands in iron-based superconductor BaFe1.85Co0.15As2
• Impact of the 2 Fe unit cell on the electronic structure measured by ARPES in iron pnictides
• In-situ strain-tuning of the metal-insulator-transition of Ca${}_2$RuO${}_4$ in angle-resolved photoemission experiments
• Anisotropic spin fluctuations in detwinned FeSe
• Effect of nematic ordering on electronic structure of FeSe
• Nematicity in stripe ordered cuprates probed via resonant x-ray scattering
• Model of Electronic Structure and Superconductivity in Orbitally Ordered FeSe
• Distinguishing spin-orbit coupling and nematic order in the electronic spectrum of iron-based superconductors
• Heat capacity study of BaFe${}_2$As${}_2$: effects of annealing
• Effect of disorder on the resistivity anisotropy near the electronic nematic phase transition in pure and electron-doped BaFe${}_2$As${}_2$
• Thermal Conductivity of the Pyrochlore Superconductor KOs2O6: Strong Electron Correlations and Fully Gapped Superconductivity
• Symmetric and antisymmetric strain as continuous tuning parameters for electronic nematic order
• Detailed band structure of twinned and detwinned BaFe${}_2$As${}_2$ studied with angle-resolved photoemission spectroscopy
• In-situ strain tuning of the Dirac surface states in Bi2Se3 films
• Influence of Spin Orbit Coupling in the Iron-Based Superconductors
• The form and the origin of the orbital ordering in the electronic nematic phase of the Iron-based superconductors
• Angle-resolved photoemission study of the role of nesting and orbital orderings in the antiferromagnetic phase of BaFe2As2
• Critical divergence of the symmetric ($A_{1g}$) nonlinear elastoresistance near the nematic transition in an iron-based superconductor
• Driving force of the orbital-relevant electronic nematicity in Fe-based superconductors

Cited by in corpus (36)

• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• On the Remarkable Superconductivity of FeSe and its Close Cousins
• The Nematic Energy Scale and the Missing Electron Pocket in FeSe
• The relationship between transport anisotropy and nematicity in FeSe
• Hydrostatic and uniaxial pressure tuning of iron-based superconductors: Insights into superconductivity, magnetism, nematicity and collapsed tetragonal transitions
• Revealing the single electron pocket of FeSe in a single orthorhombic domain
• Discovery of mesoscopic nematicity wave in iron-based superconductors
• Non-local $d_{xy}$ nematicity and the missing electron pocket in FeSe
• Spontaneous orbital polarization in the nematic phase of FeSe
• Orbital transmutation and the electronic spectrum of FeSe in the nematic phase
• FeSe and the missing electron pocket problem
• Heat-capacity measurements under uniaxial pressure using a piezo-driven device
• Inter-orbital nematicity and the origin of a single electron Fermi pocket in FeSe
• Orientational order parameters for arbitrary quantum systems
• Angle-resolved photoemission spectroscopy with an $\text{in situ}$ tunable magnetic field
• Momentum-resolved measurement of electronic nematic susceptibility in the FeSe${}_{0.9}$S${}_{0.1}$ superconductor
• Anomalous contribution to the nematic electronic states from the structural transition in FeSe revealed by time- and angle-resolved photoemission spectroscopy
• Evidence for an Additional Symmetry Breaking from Direct Observation of Band Splitting in the Nematic State of FeSe Superconductor
• Anisotropic quasiparticle coherence in nematic BaFe${}_2$As${}_2$ studied with strain-dependent ARPES
• Anomalous spectral weight transfer in the nematic state of iron-selenide superconductor
• Anomalous magneto-elastic coupling in Au-doped BaFe2As2
• Revealing the orbital origins of exotic electronic states with Ti substitution in kagome superconductor CsV3Sb5
• Low work function in the 122-family of iron-based superconductors
• Multipolar nematic state of nonmagnetic FeSe based on the DFT+$U$
• Nematic spectral signatures of the Hund's metal
• Uniaxial stress effect on the electronic structure of quantum materials
• Nematic superconductivity from selective orbital pairing in Ba(Fe1-xMx)2As2 (M = Co, Ni) single crystals
• Orbital-dependent modulation of the superconducting gap in uniaxially strained Ba${}_{0.6}$K${}_{0.4}$Fe${}_2$As${}_2$
• Elasto-Raman scattering: arsenic optical phonon as a probe of nematicity in BaFe${}_2$As${}_2$
• Atomic-scale imaging of electronic nematicity in ferropnictides
• Acoustic lattice instabilities at the magneto-structural transition in Fe${}_{1.057(7)}$Te
• On the existence of nematic-superconducting states in the Ginzburg-Landau regime
• Oxide MBE-ARPES at SSRL Beamline 5-2
• Energy-Resolved Real-Space Imaging of Orbital Nematicity in an Fe-Based Superconductor
• Strong local moment antiferromagnetic spin fluctuations in V-doped LiFeAs
• Pomeranchuk instability in the nematic phase of two monolayer FeSe/SrTiO3