Extension Theory for Magnon of a Ferromagnetic Superlattice |
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| Authors: | Song PAN Yi-Fang ZHOU Tsung-Han LIN |
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| Affiliation: | 1. Physics Department, Peking University, Beijing 100871, China;2. CCAST (World Laboratory), P. O. Box 8730, Beijing 100080, China |
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| 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. |
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