Electromagnetic Response and Approximate SO(5) Symmetry in High-Tc Superconductors

Details Electromagnetic Response and Approximate SO(5) Symmetry in High-Tc Superconductors Electromagnetic Response and Approximate SO(5) Symmetry in High-Tc Superconductors

1998-01-28

arxiv.org/abs/cond-mat/9801303v1

Phys.Rev. B58 (1998) 14749-14752

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.58.R14749

It has been proposed that the effective Hamiltonian describing high T_c superconductivity in cuprate materials has an approximate SO(5) symmetry relating the superconducting (SC) and antiferromagnetic (AF) phases of these systems. We show that robust consequences of this proposal are potentially large optical conductivities and Raman scattering rates in the AF phase, due to the electromagnetic response of the doubly-charged pseudo Goldstone bosons which must exist there. This provides strong constraints on the properties of the bosons, such as their mass gap and velocity.

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