The charge and spin sectors of the $t$-$t'$ Hubbard model

Details The charge and spin sectors of the $t$-$t'$ Hubbard model The charge and spin sectors of the $t$-$t'$ Hubbard model

2007-07-25

arxiv.org/abs/0707.3836v1

Physica C 408, 284 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1016/j.physc.2004.02.147

The charge and spin sectors, which are intimately coupled to the fermionic one, of the $t$-$t'$ Hubbard model have been computed self-consistently within the two-pole approximation. The relevant unknown correlators appearing in the causal bosonic propagators have been computed by enforcing the constraints dictated by the hydrodynamics and the algebra of the composite operators coming into play. The proposed scheme of approximation extends previous calculations made for the fermionic sector of the $t$-$t'$ Hubbard model and the bosonic sector of the Hubbard model, which showed to be very effective to describe the overdoped region of cuprates (the former) and the magnetic response of their parent compounds (the latter).

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