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- W2026541521 abstract "The ground‐state and the spin‐wave states of the Hamiltonian, H= ∑ i (SixSi+1x+SiySi+1y+ρSizSi+1z), are studied for all values of ρ, and analytical expressions are given for their energies. On the other hand, by using a canonical transformation which changes H(ρ) into ‐H(‐ ρ), the states of highest energy can also be obtained. The ground state is ferromagnetic for ρ ≤ − 1 and antiferromagnetic for ρ ≥ −1. For ρ = ±1, the energy has singularities, but it remains continuous. For ρ = 1, all its derivatives are also continuous. In the range − 1 ≤ ρ ≤ 1, the spin‐wave states of given momentum are degenerate but for ρ ≥ 1; this degeneracy is removed, and an energy gap G(ρ) appears." @default.
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- W2026541521 date "1966-08-01" @default.
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- W2026541521 title "Anisotropic Linear Magnetic Chain" @default.
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- W2026541521 doi "https://doi.org/10.1063/1.1705048" @default.
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