期刊
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
卷 56, 期 10, 页码 3005-3018出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10773-017-3467-7
关键词
Intrinsic localized modes; Modulational instability; Two-dimensional ferromagnets; The uniaxial anisotropy
资金
- National Natural Science Foundation of China [11604121]
- Hunan Provincial Education Department [16B210]
- Natural Science Fund Project of Hunan Province [2017JJ3255]
An analytical study on the properties of intrinsic localized modes and modulational instability in a quantum two-dimensional ferromagnet with single-ion uniaxial anisotropy is completed in the semiclassical limit. By making use of the semidiscrete multiple-scale method, we obtain a line localized solution and a radially symmetric localized solution, and analyze their existence conditions. Taking into account that the existence of bright localized solutions is closely linked to the modulational instability of plane waves, we analytically study the discrete modulational instability of plane spin waves. The result of the modulational instability analysis show that the uniaxial anisotropy plays a key role in the appearance of our intrinsic localized spin wave modes.
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