Soft magnons in anisotropic ferromagnets
G. E.W. Bauer (Chinese Academy of Sciences, TU Delft - QN/Bauer Group, Kavli Institute for Theoretical Sciences, Tohoku University)
P. Tang (Tohoku University)
M. Elyasi (Tohoku University)
Y.M. Blanter (Kavli institute of nanoscience Delft, TU Delft - QN/Blanter Group)
B. J. Van Wees (Rijksuniversiteit Groningen)
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Abstract
We discuss spin-wave transport in anisotropic ferromagnets with an emphasis on the zeros of the band edges as a function of a magnetic field. An associated divergence of the magnon spin should be observable by enhanced magnon conductivities in nonlocal configurations, especially in two-dimensional ferromagnets.