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Extension Theory for Magnon of a Ferromagnetic Superlattice
Authors:Song PAN  Yi-Fang ZHOU  Tsung-Han LIN
Affiliation:1. Physics Department, Peking University, Beijing 100871, China;2. CCAST (World Laboratory), P. O. Box 8730, Beijing 100080, China
Abstract:We prove that the extension theory for lattice Green's functions can be used to study Heisenberg ferromagnetic systems. As an example, the magnon spectrum of a ferromagnetic superlat tice is calculated by the extension theory for lattice Green's functions cooperated with the transfer matrix technique. The spectrum of magnetic excitation near the surface of a ferromagnetic superlattice is also presented.
Keywords:
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