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Type: Artigo de periódico
Title: Zero-point Vacancy Concentration In A Model Quantum Solid: A Reversible-work Approach
Author: Pessoa R.
De Koning M.
Vitiello S.A.
Abstract: We investigate the influence of anharmonic effects on the zero-point vacancy concentration in a boson system model in the solid phase at T=0 K. We apply the reversible-work method to compute the vacancy formation free energy and the vacancy concentration in the system. A comparison of our results with those obtained using the harmonic approximation show that anharmonic effects reduce the formation free energy by ∼25%, leading to an increase of the zero-point vacancy concentration by more than an order of magnitude. © 2009 Springer Science+Business Media, LLC.
Rights: fechado
Identifier DOI: 10.1007/s10955-009-9702-8
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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