Mott insulators, no double occupancy, and non-Abelian superconductivity
Mike Guidry, Yang Sun, Cheng-Li Wu
DOI 10.1103/PhysRevB.70.184501 · Physical Review B
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Abstract
SU(4) dynamical symmetry is shown to imply a no-double-occupancy constraint on the minimal symmetry description of antiferromagnetism and d-wave superconductivity. This implies a maximum doping fraction of 14 for cuprates and provides a microscopic critique of the projected SO(5) model. We propose that SU(4) superconductors are representative of a class of compounds that we term non-Abelian superconductors. We further suggest that non-Abelian superconductors may exist having SU(4) symmetry and therefore cupratelike dynamics, but without d-wave hybridization.
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