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- W1973376784 abstract "We study, both numerically and variationally, the interplay between different types of elementary excitations in the model of a spin chain with anisotropic spin-orbit coupling, in the vicinity of the dimer line with an exactly known dimerized ground state. Our variational treatment is found to be in a qualitative agreement with the exact diagonalization results. Soliton pairs are shown to be the lowest excitations only in a very narrow region of the phase diagram near the dimer line, and the phase transitions are always governed by magnon-type excitations which can be viewed as soliton-antisoliton bound states. It is shown that when the anisotropy exceeds certain critical value, a new phase boundary appears. In the doped model on the dimer line, the exact elementary charge excitation is shown to be a hole bound to a soliton. Bound states of those charged solitons are studied; exact solutions for N-hole bound states are presented." @default.
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- W1973376784 date "2001-01-22" @default.
- W1973376784 modified "2023-09-25" @default.
- W1973376784 title "Elementary excitations in one-dimensional spin-orbit models: Neutral and charged solitons and their bound states" @default.
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- W1973376784 doi "https://doi.org/10.1103/physrevb.63.064418" @default.
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