The phenomenology and theory of spin gap effects in high temperature superconductors is summarized. It is argued that the spin gap behavior can only be explained by a model of charge 0 spin 1 2 fermions which become paired into singlets and that there are both theoretical and experimental reasons for believing that the pairing is greatly enhanced in the bilayer structure of the Y1Ba2Cu3O6 + x system.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- antiferromagnetic correlations
- spin-charge separation