Probing the pairing symmetry of the iron pnictides with electronic Raman scattering

Abstract

An important issue in the study of the iron-arsenic based superconductors is the symmetry of the superconducting gap, a problem complicated by multiple gaps on different Fermi surface sheets. Electronic Raman scattering is a flexible bulk probe which allows one in principle to determine gap magnitudes and test for gap nodes in different regions of the Brillouin zone by employing different photon polarization states. Here we calculate the clean Raman intensity for $A_{1g}$, $B_{1g}$ and $B_{2g}$ polarizations, and discuss the peak structures and low-energy power laws which might be expected for several popular models of the superconducting gap in these systems.

9 pages, 9 figures

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Cited by in corpus (20)

• Gap symmetry and structure of Fe-based superconductors
• FeAs-based superconductivity: a case study of the effects of transition metal doping on BaFe2As2
• Band and momentum dependent electron dynamics in superconducting $\mathrm{Ba}(\mathrm{F}{\mathrm{e}}_{1-\mathrm{x}}\mathrm{C}{\mathrm{o}}_{\mathrm{x}}{)}_2\mathrm{A}{\mathrm{s}}_2$ as seen via electronic Raman scattering
• Signature of the Leggett mode in the A1g Raman response: from MgB2 to iron-based superconductors
• A balancing act: Evidence for a strong subdominant d-wave pairing channel in $\mathrm{B}{\mathrm{a}}_{0.6}{\mathrm{K}}_{0.4}\mathrm{F}{\mathrm{e}}_2\mathrm{A}{\mathrm{s}}_2$
• Nematic resonance in the Raman response of iron-based superconductors
• Collective $d-$wave Excitonic Modes in the Fe-Superconductors
• Impact of the Spin Density Wave Order on the Superconducting Gap of Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Collective modes in multiband superconductors: Raman scattering in iron selenides
• Conservation laws, vertex corrections, and screening in Raman spectroscopy
• Electronic Raman scattering from orbital nematic fluctuations
• Raman resonance in iron-based superconductors: The magnetic scenario
• Robust accidental nodes and zeroes and critical quasiparticle scaling in iron-based multiband superconductors
• Fluctuations and pairing in Fe-based superconductors: Light scattering experiments
• Screening of the Raman response in multiband superconductors -- application to iron-pnictides
• Signatures of a momentum independent pseudogap in the electronic density of states and Raman spectroscopy of the underdoped cuprates
• Constraints Imposed by Symmetry on Pairing Operators for the Pnictides
• The effect of disorder on electronic Raman scattering in the superconducting state of iron pnictides
• Raman response in superconducting multiorbital systems with application to nickelates
• Raman response of collective modes in multicomponent superconductors