Spin-orbital interplay and topology in the nematic phase of iron pnictides

Abstract

The origin of the nematic state is an important puzzle to be solved in iron pnictides. Iron superconductors are multiorbital systems and these orbitals play an important role at low energy. The singular $C_4$ symmetry of $d_{zx}$ and $d_{yz}$ orbitals has a profound influence at the Fermi surface since the $\Gamma$ pocket has vortex structure in the orbital space and the X/Y electron pockets have $yz$/$zx$ components respectively. We propose a low energy theory for the spin--nematic model derived from a multiorbital Hamiltonian. In the standard spin--nematic scenario the ellipticity of the electron pockets is a necessary condition for nematicity. In the present model nematicity is essentially due to the singular $C_4$ symmetry of $yz$ and $zx$ orbitals. By analyzing the ($\pi ,0$) spin susceptibility in the nematic phase we find spontaneous generation of orbital splitting extending previous calculations in the magnetic phase. We also find that the ($\pi ,0$) spin susceptibility has an intrinsic anisotropic momentum dependence due to the non trivial topology of the $\Gamma$ pocket.

10 pages (main text + 2 appendices), 3 figures, final version

References in corpus (67)

• Nematic order in iron superconductors - who is in the driver's seat?
• Evidence for an electron nematic phase transition in underdoped iron pnictide superconductors
• Near-degeneracy of several pairing channels in multiorbital models for the Fe-pnictides
• 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
• Ising and Spin orders in Iron-based Superconductors
• Nematic and meta-nematic transitions in the iron pnictides
• Ferro-Orbital Order and Strong Magnetic Anisotropy in the Parent Compounds of Iron-Pnictide Superconductors
• Orbital-driven nematicity in FeSe
• Preemptive nematic order, pseudogap, and orbital order in the iron pnictides
• Effects of nematic fluctuations on the elastic properties of iron arsenide superconductors
• Magnetism and Charge Dynamics in Iron Pnictides
• Uniaxial strain detwinning of CaFe2As2 and BaFe2As2: optical and transport study
• Nodal Spin Density Wave and band topology of the FeAs based materials
• In-plane electronic anisotropy of underdoped "122" Fe-arsenide superconductors revealed by measurements of detwinned single crystals
• Orbital Order and Spontaneous Orthorhombicity in Iron Pnictides
• Nematic spin fluid in the tetragonal phase of BaFe2As2
• Three orbital model for the iron-based superconductors
• Orbital Ordering and Unfrustrated $(\pi ,0)$ Magnetism from Degenerate Double Exchange in the Iron Pnictides
• Nematic spin correlations in the tetragonal state of uniaxial strained BaFe2-xNixAs2
• Unprecedented anisotropic metallic state in BaFe2As2 revealed by optical spectroscopy
• Visualization of Electron Nematicity and Unidirectional Antiferroic Fluctuations at High Temperatures in NaFeAs
• Observation of incipient charge nematicity in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Nematic susceptibility of hole- and electron-doped BaFe2As2 iron-based superconductors from shear modulus measurements
• Magnetically-Driven Suppression of Nematic Order in an Iron-Based Superconductor
• Manifestations of nematic degrees of freedom in the magnetic, elastic, and superconducting properties of the iron pnictides
• Anisotropic Impurity-States, Quasiparticle Scattering and Nematic Transport in Underdoped Ca(Fe1-xCox)2As2
• Anisotropic charge dynamics in detwinned Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Symmetry of spin excitation spectra in the tetragonal paramagnetic and superconducting phases of 122-ferropnictides
• Sign-reversal of the in-plane resistivity anisotropy in iron pnictides
• Sign-reversal of the in-plane resistivity anisotropy in hole-doped iron pnictides
• Distinct electronic nematicities between electron and hole underdoped iron pnictides
• Interplay of magnetic and structural transitions in Fe-based pnictide superconductors
• Theory of itinerant magnetic excitations in the SDW phase of iron-based superconductors
• Nematic State of the Pnictides Stabilized by the Interplay Between Spin, Orbital, and Lattice Degrees of Freedom
• Effect of uniaxial strain on the structural and magnetic phase transitions in BaFe${}_2$As${}_2$
• Competing orders in FeAs layers
• Anisotropy of the in-plane resistivity of underdoped Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ superconductors induced by impurity scattering in the antiferromagnetic orthorhombic phase
• Electronic reconstruction through the structural and magnetic transitions in detwinned NaFeAs
• The magnetic excitation spectra in BaFe${}_2$As${}_2$: a two-particle approach within DFT+DMFT
• Conductivity anisotropy in the antiferromagnetic state of iron pnictides
• Leggett modes in iron-based superconductors as a probe of Time Reversal Symmetry Breaking
• Low magnetization and anisotropy in the antiferromagnetic state of undoped iron pnictides
• Effect of Co doping on the in-plane anisotropy in the optical spectrum of underdoped Ba(Fe1-xCox)2As2
• Magnetic and Metallic State at Intermediate Hubbard U Coupling in Multiorbital Models for Undoped Fe Pnictides
• The low-energy phase-only action in a superconductor: a comparison with the XY model
• Thermopower as sensitive probe of electronic nematicity in iron pnictides
• Effect of disorder on the resistivity anisotropy near the electronic nematic phase transition in pure and electron-doped BaFe${}_2$As${}_2$
• Detection of Orbital Fluctuations Above the Structural Transition Temperature in the Iron-Pnictides and Chalcogenides
• Microscopically derived Ginzburg-Landau theory for magnetic order in the iron pnictides
• Emergent defect states as a source of resistivity anisotropy in the nematic phase of iron pnictides
• Theory of fluctuation conductivity from interband pairing in pnictide superconductors
• Uniaxial pressure effect on structural and magnetic phase transitions in NaFeAs and its comparison with as-grown and annealed BaFe${}_2$As${}_2$
• Anisotropic in-plane optical conductivity in detwinned Ba(Fe1-xCox)2As2
• Magnetic excitations in underdoped Ba(Fe1-xCox)2As2 with x=0.047
• Effect of the tetrahedral distortion on the electronic properties of iron-pnictides
• Effects of Lifshitz Transition on Charge Transport in Magnetic Phases of Fe-Based Superconductors
• Crystal Symmetry and Magnetic Order in Iron Pnictides: a Tight Binding Wannier Function Analysis
• Nematic phase without Heisenberg physics in FeAs planes
• Topological Surface States in Paramagnetic and Antiferromagnetic Iron Pnictides
• Diverging Nematic Susceptibility, Physical Meaning of T* scale, and Pseudogap in the Spin Fermion Model for Pnictides
• Effect of uniaxial pressure on the magneto-structural transitions of iron arsenide superconductors
• Nesting Induced Large Magnetoelasticity in the Iron Arsenide Systems
• High impact of spin-nematic order on the lattice domains in thin films of iron-based superconductors
• Anisotropic inplane spin correlation in the parent and Co-doped BaFe2As2: a neutron scattering study
• Possible Nematic Order Driven by Magnetic Fluctuations in Iron Pnictides

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• Spin reorientation driven by the interplay between spin-orbit coupling and Hund's rule coupling in iron pnictides
• Reliability and applicability of magnetic force linear response theory: Numerical parameters, predictability, and orbital resolution
• Disorder-promoted $C_4$-symmetric magnetic order in iron-based superconductors
• Nematicity, magnetism and superconductivity in FeSe under pressure: Unified explanation based on the self-consistent vertex correction theory
• Spin-Driven Nematic Instability of the Multi-Orbital Hubbard Model: Application to Iron-Based Superconductors
• Orbital mismatch boosting nematic instability in iron-based superconductors
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• Anisotropy of the DC conductivity due to orbital-selective spin fluctuations in the nematic phase of iron superconductors
• Electronic origin of structural transition in 122 Fe based superconductors
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