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- W3103281369 endingPage "747" @default.
- W3103281369 startingPage "740" @default.
- W3103281369 abstract "In terms of spinless fermions and spin waves, we describe the magnetic properties of a spin-1/2 ferromagnetic-antiferromagnetic bond-alternating chain which behaves as a Haldane-gap antiferromagnet. On the one hand, we employ the Jordan–Wigner transformation and treat the fermionic Hamiltonian within the Hartree–Fock approximation. On the other hand, we employ the Holstein–Primakoff transformation and modify the conventional spin-wave theory so as to restore the sublattice symmetry. We calculate the excitation gap, the specific heat, the magnetic susceptibility, magnetization curves, and the nuclear spin-lattice relaxation rate with varying bond alternation. These schemes are further applied to a bond-alternating tetramerized chain which behaves as a ferrimagnet. The fermionic language is particularly stressed as a useful tool for investigating one-dimensional spin-gapped antiferromagnets, while the bosonic one works better for ferrimagnets." @default.
- W3103281369 created "2020-11-23" @default.
- W3103281369 creator A5066361219 @default.
- W3103281369 creator A5085406027 @default.
- W3103281369 date "2005-08-01" @default.
- W3103281369 modified "2023-09-27" @default.
- W3103281369 title "Fermionic versus bosonic descriptions of one-dimensional spin-gapped antiferromagnets" @default.
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