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- W2006194087 abstract "A family of one-dimensional magnetic Hamiltonians is introduced, where at each site there are $n$ spin-$S$ operators. It is shown that, for special couplings between spins and for $S=frac{1}{2}$, the model contains the complete spectrum of the Heisenberg chain with spins textonehalf{}, 1, frac32;, etc., and the ground state is that of the corresponding Heisenberg chain. By the varying of a single parameter the model allows continuous transitions between chains with different spin. We map the spin-($S+S$) model onto the nonlinear $ensuremath{sigma}$ model and discuss the possibility of a finite gap in the spin-(textonehalf{}+textonehalf{}) model." @default.
- W2006194087 created "2016-06-24" @default.
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- W2006194087 date "1986-07-01" @default.
- W2006194087 modified "2023-09-25" @default.
- W2006194087 title "Anisotropic Heisenberg chain with composite spin" @default.
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- W2006194087 doi "https://doi.org/10.1103/physrevb.34.487" @default.
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