论文标题
通过对称和反对称交换相互作用诱导的非共线磁体中磁镁相互作用的影响
Effects of magnon-magnon interactions in a noncollinear magnet induced by combination of a symmetric and an antisymmetric exchange interaction
论文作者
论文摘要
我们研究了通过抗磁性海森堡相互作用和dzyaloshinsky-Moriya相互作用的组合引起的磁磁相互作用及其在螺旋磁铁中的作用。我们表明，镁麦克努尼相互作用对低能木元的主要作用是重新构成能量分散系数。这可以解释为什么某些实验与非相互作用理论一致。我们还表明，尽管镁麦克努尼相互作用诱导了低能镁的配对振幅，但其对激发能的影响却可以忽略不计。这表明，对于磁蛋白，有限对振幅不一定伴随着凝结。
We study magnon-magnon interactions and their effects in a spiral magnet induced by combination of an antiferromagnetic Heisenberg interaction and a Dzyaloshinsky-Moriya interaction. We show that the main effect of magnon-magnon interactions on low-energy magnons is to renormalize the coefficient of energy dispersion. This could explain why some experiments are consistent with the noninteracting theory. We also show that although the magnon-magnon interactions induce the pair amplitude for low-energy magnons, its effect on the excitation energy is negligible. This suggests that for magnons the finite pair amplitude does not necessarily accompany the pair condensation.
