Dispersion of the strongly correlated electron system near the Fermi level

Abstract

The reason for the appearance of two distinct bands in the photoemission of the single CuO${}_2$ plane Bi${}_2$Sr${}_{2-x}$La${}_x$CuO${}_{6+\delta }$ near the Fermi level is discussed on the basis of the self-consistent solution of the two-dimensional t-J model.

5 pages, 5 figures