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Brownian Motion of a Heavy Impurity in Harmonic Lattices
Phys. Rev. 167, 229 – Published 5 March, 1968
DOI: https://doi.org/10.1103/PhysRev.167.229
Abstract
Starting from the well-known expression for the frequency spectrum of a mass impurity in a harmonic lattice, the velocity autocorrelation function for a heavy impurity has been calculated without referring to any particular model. Using then general arguments, the postulates of Langevin's equation have been briefly discussed.
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