A variational Approach to the Study
of Strongly Correlated Electron Systems
by
Edison A. Enaibe
Department Physics, University of Benin Benin City, Nigeria
And
John O. A. Idiodi
Department of Physics, University of Benin Benin City, Nigeria
Abstract
An investigation of the dynamic behavior of two electrons interacting
under an extended Hubbard - type potential (t - t’ –
U model) is presented., employing a variational analytic approach.
The role of the next – nearest neighbour hopping parameter
t’ is discussed and the results obtained form the extended
Hubbard model are compared with those emerging from the usual
t - u Hubbard model which contains only a nearest neighbour
hopping parameter t.