Local magnon modes and resonances for dynamical skyrmions in Heisenberg two-dimensional ferromagnets

被引：6
|
作者：
Abdullaev, FK [1 ]
Galimzyanov, RM [1 ]
Kirakosyan, AS [1 ]
机构：
[1] Uzbek Acad Sci, Div Theoret, Phys Tech Inst, Tashkent 700084, Uzbekistan
来源：
PHYSICAL REVIEW B | 1999年 / 60卷 / 09期
关键词：
D O I：
10.1103/PhysRevB.60.6552
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We investigate bound magnon states localized on dynamical topological solitons (dynamical skyrmions) in two-dimensional (2D) Heisenberg weakly uniaxial ferromagnets. The exact analytical expressions for zero modes are derived. It is shown that in addition to zero modes with "angular momentum" numbers m=0, +/-1 truly local modes can exist in 2D ferromagnets on dynamical vortices provided that the magnon dispersion relation has a gap. We study real local modes for dynamical solitons with topological charges nu=1,2. Eigenfrequencies of these modes are calculated numerically. It may be possible to observe resonance effects on eigenfrequencies of internal oscillations of dynamical skyrmions in 2D weakly easy-axis ferromagnets. [S0163-1829(99)05033-X].
引用
收藏
页码：6552 / 6557
页数：6
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