Landau-Lifshitz magnetodynamics as a Hamilton model: Magnons in an instanton background

Igor V. Ovchinnikov, Kang L. Wang

研究成果: Article同行評審

4 引文 斯高帕斯(Scopus)

摘要

To take full advantage of the well-developed field-theoretic methods, Magnonics needs a yet-existing Lagrangian formulation. Here, we show that Landau-Lifshitz magnetodynamics is a member of the covariant-Schrödinger- equation family of Hamilton models and apply the covariant background method arriving at the Ginzburg-Landau Lagrangian formalism for magnons in an instanton background. Magnons appear to be nonrelativistic spinless bosons, which feel instantons as a gauge field and as a Bose condensate. Among the examples of the usefulness of the proposition is the recognition of the instanton-induced phase shifts in magnons as the Berry phase and the interpretation of the spin-transfer-torque generation as a ferromagnetic counterpart of the Josephson supercurrent.

原文English
文章編號024410
期刊Physical Review B - Condensed Matter and Materials Physics
82
發行號2
DOIs
出版狀態Published - 2010 7月 13

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學

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