Published: March 15, 1991Received: October 26, 1990Available on J-STAGE: February 25, 2010Accepted: January 14, 1991
Advance online publication: -
Revised: -
A simple interpolation scheme between insulator and metal limits of the so-called tJ-model of strongly correlated electrons is proposed. The Fermi surface exists in this model, but does not satisfy Luttinger's theorem. D-wave pairing is possible through the super-exchange coupling.
