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General Questions and Answers / Re: Questions about Eigenvectors
« on: May 26, 2017, 12:12 »
For a given k-point, I guess that the number of eigenvectors is the same as the number of phonon modes = 3xN, where N is the number of atoms in the unit cell you have adopted to calculate phonons in your system; the eigenvector dimension is given by the dimension of the Dynamical Matrix as briefly discussed in http://docs.quantumwise.com/manuals/Types/VibrationalMode/VibrationalMode.html.
If N=2, e.g., for the primitive cell of a single graphene sheet, the matrix dimension is then 6x6, meaning that each eigenvector has 6 elements.
If N=2, e.g., for the primitive cell of a single graphene sheet, the matrix dimension is then 6x6, meaning that each eigenvector has 6 elements.