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High-energy spinless fermion model

In this section we derive an effective Hamiltonian that describes the high energy physics associated with particle-hole (or ionic) excitations across the charge gap. The Hamiltonian will describe a hole in the lower Hubbard band and a particle in the upper Hubbard band, interacting with an attractive potential. This attractive potential leads to bound, excitonic states. In the next chapter we derive an effective-particle model for these excitons. A real-space representation of an ionic state is illustrated in Fig. 5.5(b). [Pg.66]

For this particle-hole excitation the A -body problem has thus been mapped onto the two-body problem, described by, [Pg.67]


See other pages where High-energy spinless fermion model is mentioned: [Pg.65]    [Pg.66]    [Pg.65]    [Pg.66]   


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