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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, SA
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 similar to 25%, leading to an increase of the zero-point vacancy concentration by more than an order of magnitude.
Subject: Quantum solids
Vacancy concentration
Anharmonic effects
Reversible work method
Country: EUA
Editor: Springer
Rights: fechado
Identifier DOI: 10.1007/s10955-009-9702-8
Date Issue: 2009
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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