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- W2093769235 abstract "A bond operator representation for three $S=frac{1}{2}$ spins is obtained along the same line as the two-spin cases. With the spin and the chirality freedom expressed by the same bond operators, we studied the elementary excitations of the spin-tube and the spin-orbit models. For $3$-leg spin ladders and general spin ladders with an odd number of legs and periodic boundary conditions in the rung direction, the spinonlike excitations, which carry $frac{1}{2}$ spin and chirality freedoms, are calculated by a variational ansatz. The magnonlike excitations, which denote the change of a dimerized bond from spin singlet to spin triplet and/or from chirality triplet to chirality singlet, or from one kind of chirality triplet to another chirality triplet, with different z-component, are also studied. Bound states of spinonlike excitation pairs exist near the vicinity of momentum zone center $ensuremath{pi}/2.$ The bond operators are also applied to other general spin-orbit models with spontaneously dimerized ground states, and the elementary excitations are studied." @default.
- W2093769235 created "2016-06-24" @default.
- W2093769235 creator A5072365834 @default.
- W2093769235 date "2001-10-03" @default.
- W2093769235 modified "2023-09-23" @default.
- W2093769235 title "Elementary excitations in the spin-tube and spin-orbit models" @default.
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- W2093769235 doi "https://doi.org/10.1103/physrevb.64.174410" @default.
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