On the relation between the boson-fermion model and RVB state

Eugeny Kochetov; Marcin Mierzejewski

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On the relation between the boson-fermion model and RVB state

Eugeny Kochetov·Marcin Mierzejewski

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Abstract

We show that the resonating valence bond (RVB) state of the t-J Hamiltonian can be described within an effective boson-fermion model. We derive a boson-fermion Hamiltonian which describes the lowest order coupling between holons and spinon waves. The RVB order parameter determines a hybridization between the both types of excitations. The effective Hamiltonian is investigated within the lowest order self-consistent conserving diagrammatic approximation. We compare our approach with the phenomenological boson--fermion model (BFM) that is believed to describe the pseudogap phase.

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Eugeny Kochetov, Marcin Mierzejewski. 2002-04-23. On the relation between the boson-fermion model and RVB state. https://arxiv.org/abs/cond-mat/0204420

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