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- W2078662670 abstract "The Gutzwiller-projected BCS Hamiltonian is a useful model for high-temperature superconductivity due to its equivalence to the Heisenberg model at half filling and a close connection to the t–J model at moderate doping. In this work, a dynamical mean field theory (DMFT) is developed for the BCS Hamiltonian with d-wave pairing subject to on-site repulsive interaction, U, which we call the BCS+U model. The large-U limit corresponds to the Gutzwiller-projected BCS Hamiltonian. It is shown that the equivalence between the Heisenberg and the Gutzwiller-projected BCS model is a manifestation of a broader duality in the BCS+U model: for any finite U, the local dynamics of the BCS+U model is dual at half filling with respect to the exchange between the hopping parameter, t, and the pairing amplitude, Δ. It is explicitly demonstrated in our DMFT analysis that the real superconducting gap, determined from the sharp coherence peaks in the local density of states, shows strong renormalization from its bare value as a function of U." @default.
- W2078662670 created "2016-06-24" @default.
- W2078662670 creator A5060099370 @default.
- W2078662670 date "2009-07-15" @default.
- W2078662670 modified "2023-09-26" @default.
- W2078662670 title "Dynamical mean field theory of the repulsive BCS+Umodel" @default.
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- W2078662670 doi "https://doi.org/10.1088/1367-2630/11/7/073027" @default.
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