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- W2022135493 abstract "Abstract An analytical approach, based on the unitary transformation method, has been developed to study the effects of quantum lattice fluctuations on the Peierls transition in the one-dimensional half-filled spin- 1 2 Holstein model. The nonadiabatic effects due to finite phonon frequency ω0>0 are treated through an energy-dependent electron–phonon scattering function δ(k′,k) and the Green's function method is used to implement the perturbation treatment. The dimerization gap and the phonon-staggered ordering parameter are obtained. We show that at a finite electron–phonon coupling constant, there exists always the Peierls dimerization for any finite phonon frequency in spin- 1 2 Holstein model. With increasing lattice fluctuations, the gap and the phonon-staggered ordering decrease gradually. Our results agree well with those of quantum Monte Carlo simulations." @default.
- W2022135493 created "2016-06-24" @default.
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- W2022135493 date "2003-07-01" @default.
- W2022135493 modified "2023-09-30" @default.
- W2022135493 title "Quantum lattice fluctuations in the molecular-crystal model" @default.
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- W2022135493 doi "https://doi.org/10.1016/s0921-4526(03)00094-2" @default.
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