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- W2000623280 abstract "We investigate the ground state and the excitation spectrum associated with the localized defect states of the three-quarter-filled, one-dimensional Peierls-Hubbard model. In the continuum limit with an infinite, on-site electron-electron repulsion energy U, the Hamiltonian is mapped onto the N=1 Gross-Neveu model, in which irrationally charged soliton-antisoliton pairs are formed upon doping, while polarons are unstable. Corrections due to finite-U effects are discussed. However, discreteness effects are found to support excitations absent from the continuum field theory. In particular, for large band separation a novel type of polaron can be formed with a highly localized electronic wave function surrounded by an extended pattern of local lattice distortion." @default.
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- W2000623280 date "1993-04-15" @default.
- W2000623280 modified "2023-10-18" @default.
- W2000623280 title "Excitations of the one-dimensional, two-band Peierls-Hubbard model at three-quarters filling in the large-Ulimit" @default.
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- W2000623280 doi "https://doi.org/10.1103/physrevb.47.9181" @default.
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