Ground State Energy of Extended Hubbard Model by self-consistent RPA

Details Ground State Energy of Extended Hubbard Model by self-consistent RPA Ground State Energy of Extended Hubbard Model by self-consistent RPA

2008-06-06

arxiv.org/abs/0806.1203v1

Applied Mathematical Sciences Vol 1, (2007) N? 34, 1651-1661

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages

Scientific paper

Using the SCRPA, we study the intersite interaction effect on the dynamics of N electrons system. We have considered an extended Hubbard model including intrasite and intersite interactions, and we have applied this model to a system of two neighbouring atoms containing a free electron. The application of SCRPA to this model allows us to study the intersite interaction effect on the ground state and the excitation energies of system. We show that the repulsive interaction between the electrons of the neighbouring atoms is the origin of an supplementary conductivity of the system.

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