Optical conductivity and Raman scattering of iron superconductors

Abstract

We discuss how to analyze the optical conductivity and Raman spectra of multi-orbital systems using the velocity and the Raman vertices in a similar way Raman vertices were used to disentangle nodal and antinodal regions in cuprates. We apply this method to iron superconductors in the magnetic and non-magnetic states, studied at the mean field level. We find that the anisotropy in the optical conductivity at low frequencies reflects the difference between the magnetic gaps at the X and Y electron pockets. Both gaps are sampled by Raman spectroscopy. We also show that the Drude weight anisotropy in the magnetic state is sensitive to small changes in the lattice structure.

arXiv comment14 pages, 10 figures, as accepted in Phys. Rev. B, explanations/discussion added in Secs. II, III and VI

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Cited by in corpus (33)

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• Charge Nematicity and Electronic Raman Scattering in Iron-based Superconductors
• Upper bounds on the superfluid stiffness and superconducting $T_c$: Applications to twisted-bilayer graphene and ultra-cold Fermi gases
• Magnetic interactions in iron superconductors: A review
• Exotic magnetic order in the orbital-selective Mott regime of multiorbital systems
• Origin of the resistive anisotropy in the electronic nematic phase of BaFe${}_2$As${}_2$ revealed by optical spectroscopy
• Optical conductivity of iron-based superconductors
• Nematic resonance in the Raman response of iron-based superconductors
• Manifestation of nematic degrees of freedom in the Raman response function of iron pnictides
• FeTe${}_{0.55}$Se${}_{0.45}$: a multiband superconductor in the clean and dirty limit
• Collective modes in multiband superconductors: Raman scattering in iron selenides
• Low-energy interband transitions in the infrared response of Ba(Fe1-xCox)2As2
• Correlated states in magic angle twisted bilayer graphene under the optical conductivity scrutiny
• Electronic Raman scattering from orbital nematic fluctuations
• Strong correlations and the search for high-Tc superconductivity in chromium pnictides and chalcogenides
• Optical properties of $A$Fe${}_2$As${}_2$ ($A=$Ca, Sr, and Ba) single crystals
• Correlation, doping and interband effects on the optical conductivity of iron superconductors
• Magnetic states of the five-orbital Hubbard model for one-dimensional iron-based superconductors
• Reduced Dimensionality and Magnetic Frustration in KCr${}_3$As${}_3$
• Spectral weight transfer in strongly correlated Fe${}_{1.03}$Te
• Coupling of the A_{1g} As-phonon to magnetism in iron pnictides
• Raman scattering study of spin-density-wave-induced anisotropic electronic properties in AFe2As2 (A=Ca,Eu)
• Twisted bilayered graphenes at magic angles and Casimir interactions: correlation-driven effects
• Raman resonance in iron-based superconductors: The magnetic scenario
• Temperature-induced Change in the Fermi Surface Topology in the Spin Density Wave Phase of Sr(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Accurate modeling of FeSe with screened Fock exchange and Hund's metal correlations
• Signatures of Hund Metal and finite-frequency nesting in Sr${}_2$RuO${}_4$ Revealed by Electronic Raman Scattering
• Drude weight anisotropy in the doped iron pnictides: the primary role of orbital weight redistribution along the reconstructed Fermi surfaces
• Anisotropic Kondo pseudo-gap in URu2Si2
• Cascades in transport and optical conductivity of Twisted Bilayer Graphene
• Raman response of collective modes in multicomponent superconductors
• Phase separation in iron chalcogenide superconductor Rb0.8+xFe1.6+ySe2 as seen by Raman light scattering and band structure calculations
• Hund's coupling and electronic anisotropy in the spin-density wave state of iron pnictides