A Theory of High-T_c Superconductivity in a Two-Dimensional Antiferromagnetic Lattice

抄録

A theoretical model of the Bednorz-Müller system is considered. This is a two-dimensional electron lattice with alternating spin alignment containing a certain number of holes. The isolated holes are fermions with “spin” 1/2. A pair of holes with antiparallel spins falls into a tightly bound state; a charged boson. The condensate of the bosons of this kind forms a superfluid component. An energy gap exists in the excitation spectrum of the isolated holes constituting the normal component. The tightly bound character of the charged boson is reconfirmed by solving exactly the gap equation. The transition temperature is obtained from the condition of the zero gap.