arXiv:cond-mat/0309229·v1·Superconductivity
Mott Insulators, No-Double-Occupancy, and Non-Abelian Superconductivity
Mike Guidry (University of Tennessee)🇺🇸 · Yang Sun (University of Notre Dame)🇺🇸 · Cheng-Li Wu (NCTS, Taiwan)🇹🇼
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 1/4 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 cuprate-like dynamics, but without d-wave hybridization.
Comments: 4 pages, 2 figures