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There is no need to do fast Fourier transform. It's a very cheap computation. A simple discrete Fourier transform suffices. There are formulas and matlab codes in my blog: http://blog.sciencenet.cn/blog-3102863-974194.html And make sure that you cite the correct reference as mentioned in my blog: M. Dickey and A. Paskin, Computer Simulation of the Lattice Dynamics of Solids, Phys. Rev. 188, 1407 (1969). Read this paper if you really want to understand the method. |
6Â¥2016-08-12 17:11:24













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