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Journal of Physics Condensed Matter

Evaluation of the effective holon-holon interaction by the slave-fermion method

Yongjun Liu, Jinming Dong, Chang-De Gong

Published Jul 1, 1991• 2 citations
Publisher

Abstract

The effective holon-holon interaction by exchanging the spinons in the resonating-valence bond model is derived by the slave-fermion method. The authors found that the interaction is attractive for the holon Cooper pair. Complexity due to Bose condensation of the spinons at T=0 has been discussed.
DOI
10.1088/0953-8984/3/26/012

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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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