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

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

2009-02-27

arxiv.org/abs/0902.4745v1

Phys. Rev. B 79, 174521 (2009)

Physics

Condensed Matter

Superconductivity

9 pages, 9 figures

Scientific paper

10.1103/PhysRevB.79.174521

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.

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