Stripe Formation within SO(5) Theory

Details Stripe Formation within SO(5) Theory Stripe Formation within SO(5) Theory

1998-12-16

arxiv.org/abs/cond-mat/9812282v2

Physics

Condensed Matter

Superconductivity

4 pages; revisions include additional comments and references; edited for length

Scientific paper

We study the formation of stripe order within the SO(5) theory of high T_c superconductivity. We show that spin and charge modulations arise as a result of the competition between a local tendency to phase separate and the long-range Coulomb interaction. This frustrated phase separation leads to hole-rich and hole-poor regions which are respectively superconducting and antiferromagnetic. A rich variety of microstructures ranging from droplet and striped to inverted-droplet phases are stabilized, depending on the charge carrier concentration. We show that the SO(5) energy functional favors non-topological stripes.

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