Collective modes and emergent SO(6) symmetry in the iron pnictides

Details Collective modes and emergent SO(6) symmetry in the iron pnictides Collective modes and emergent SO(6) symmetry in the iron pnictides

2008-12-15

arxiv.org/abs/0812.2907v2

Europhysics Letters 88, 17004 (2009)

Physics

Condensed Matter

Superconductivity

5 pages, 1 figure

Scientific paper

We show the existence of an emergent SO(6) symmetry in the low energy description of the iron pnictides. This approximate symmetry provides a unifying framework for the occurrence of spin density wave (SDW) and superconductivity (SC) in these materials. We use this symmetry to make several predictions for future experiments, including the topology of the phase diagram and the presence of various resonant modes in neutron scattering experiments in both the SC and SDW phases. We also predict the existence of a new "Orbital Density Wave" state, which competes with both SDW and SC orders.

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