论文标题
偶极/八极极倍极磁铁中的自旋波的分析描述
Analytic description of spin waves in dipolar/octupolar pyrochlore magnets
论文作者
论文摘要
我们得出具有偶极 - 圆孔相互作用的pyrochlore磁体中的自旋波的分析形式，例如$ {\ rm nd} _2 {\ rm zr} _2 _2 {\ rm o} _7 $。我们在线性自旋波近似中获得了对角度化的镁性哈密顿量的全部知识。我们还将“呼吸模式”的效果视为该系统的扰动。呼吸模式提高了沿$ k $ -space的方向$ x \ thew $ x \ w $的旋转波分散体的堕落。
We derive analytic forms for spin waves in pyrochlore magnets with dipolar-octupolar interactions, such as ${\rm Nd}_2{\rm Zr}_2{\rm O}_7$. We obtain full knowledge of the diagonalized magnonic Hamiltonian within the linear spin wave approximation. We also consider the effect of a "breathing mode" as a perturbation of this system. The breathing mode lifts the degeneracy of the upper band of the spin wave dispersion along the direction $X\to W$ in $k$-space.
