Summary
An interpretation of the effect proposed theoretically by Nozières and Gallet (and experimentally observed in4He), according to which the growth ratev of a crystal surface just below the roughening temperatureT R is approximately linear in the disequilibrium Δμ, is given in terms of the properties of the nucleation process in the presence of a characteristic length l. The physical meaning ofl is the distance over which information can propagate on the surface before a new layer is formed. The nucleation barrier is lowered, because the size of a critical nucleus cannot exceedl, the latter being in turn proportional tov −1/2. A self-consistency condition ensues. The effect takes place when the correlation length ξ, which diverges atT R, becomes comparable tol.
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In honour of Prof. Fausto Fumi on the occasion of his retirement from teaching.
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Levi, A.C., Kotrila, M. A poor man's interpretation of the Nozières-Gallet effect. Il Nuovo Cimento D 15, 485–491 (1993). https://doi.org/10.1007/BF02456931
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DOI: https://doi.org/10.1007/BF02456931