Abstract
We argue that Raman study of Fe-pnictides is a way to unambiguously distinguish between various superconducting gaps proposed for these materials. We show that Raman intensity develops a true resonance peak below if the pairing gap has symmetry in the folded Brillouin zone . No such peak develops for a pure -wave gap, a -wave gap, and an extended -wave gap with . We show that the peak remains quite strong for the values of interpocket impurity scattering used to fit NMR data.
- Received 14 January 2009
DOI:https://doi.org/10.1103/PhysRevB.79.220501
©2009 American Physical Society
Viewpoint
Shining light on iron pnictides with Raman scattering
Published 1 June 2009
Calculations of the Raman response for iron pnictide superconductors reveal a collective mode that may be crucial to unravel the pairing symmetry.
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