Fe(110) 上的非对称自旋波色散：Dzyaloshinskii-Moriya 相互作用的直接证据。
Asymmetric spin-wave dispersion on Fe(110): direct evidence of the Dzyaloshinskii-Moriya interaction.
机构信息
Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany.
出版信息
Phys Rev Lett. 2010 Apr 2;104(13):137203. doi: 10.1103/PhysRevLett.104.137203. Epub 2010 Mar 30.
The influence of the Dzyaloshinskii-Moriya interaction on the spin-wave dispersion in an Fe double layer grown on W(110) is measured for the first time. It is demonstrated that the Dzyaloshinskii-Moriya interaction breaks the degeneracy of spin waves and leads to an asymmetric spin-wave dispersion relation. An extended Heisenberg spin Hamiltonian is employed to obtain the longitudinal component of the Dzyaloshinskii-Moriya vectors from the experimentally measured energy asymmetry.
首次测量了生长在 W(110) 上的 Fe 双层中 Dzyaloshinskii-Moriya 相互作用对自旋波色散的影响。结果表明，Dzyaloshinskii-Moriya 相互作用打破了自旋波的简并，并导致了非对称的自旋波色散关系。采用扩展的海森堡自旋哈密顿量，从实验测量的能量不对称性中得到 Dzyaloshinskii-Moriya 向量的纵向分量。
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