Bound-magnon dominance of the magnetic susceptibility of the one-dimensional Heisenberg S =1/2 ferromagnet cyclohexylammonium trichlorocuprate (II)
1987; American Physical Society; Volume: 58; Issue: 25 Linguagem: Inglês
10.1103/physrevlett.58.2702
ISSN1092-0145
AutoresDonald N. Haines, John E. Drumheller,
Tópico(s)Nonlinear Dynamics and Pattern Formation
ResumoIn order to compare linear spin-wave theory with the effects of nonlinear excitations in spin-1/2 Ising-Heisenberg ferromagnetic chains, we have studied the differential susceptibility of (${\mathrm{C}}_{6}$${\mathrm{H}}_{11}$${\mathrm{NH}}_{3}$)${\mathrm{CuCl}}_{3}$ in the region 4.2 K<T40 K, in fields of 0, 1, 2, and 3 T. The data are analyzed in terms of linear spin-wave theory and a nonlinear theory which includes bound-magnon effects. Our analysis shows that linear spin-wave theory cannot describe the data, and that the susceptibility is dominated by the bound-magnon contribution. The correspondence between bound magnons and solitons is discussed.
Referência(s)