SPIN-CHARGE-SEPARATED SUPERCONDUCTIVITY - THE 2-COMPONENT ABELIAN-HIGGS MODEL

A square-lattice gauge-theory model for spin-charge-separated supercon ductivity is introduced. The phases of the spinon and holon order para meters couple gauge invariantly via a statistical gauge field, which a rises from the implicit strong interaction physics. We find that physi cal electronic phase correlations show a superconductor-normal-metal p hase transition of the Berezinskii-Kosterlitz-Thouless type, while sta tistical gauge-field excitations are strictly gapless. These results a re discussed in the context of both the superconducting and the normal -state properties of the oxide superconductors.