Stripes, pseudogaps, and SO(6) in the cuprate superconductors
R. S. Markiewicz, M. T. Vaughn
Abstract
We briefly summarize two related calculations. First, we demonstrate that the instabilities (either nesting or pairing) associated with the high-Tc cuprates can be described by an SO(6) transformation group. There are two independent 6-dimensional representations (`superspins'). One superspin combines Zhang's 5-component superspin with a flux phase instability; the other involves a charge density wave, s-wave superconductivity, and an exotic spin current. The second calculation is a self-consistent slave boson calculation, which provides a good description of the doping dependence of the photoemission dispersion in terms of dynamic striped phases. The stripes are stabilized by strong electron-phonon coupling, and provide evidence for a doping-dependent crossover between the two superspin groundstates.
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