Artículos de revistas
Zero-point Vacancy Concentration In A Model Quantum Solid: A Reversible-work Approach
Registro en:
Journal Of Statistical Physics. , v. 134, n. 4, p. 769 - 780, 2009.
224715
10.1007/s10955-009-9702-8
2-s2.0-62949204652
Autor
Pessoa R.
De Koning M.
Vitiello S.A.
Institución
Resumen
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. 134 4 769 780 Anderson, P.W., (2005) Physics of A Superfluid Solid, , arXiv:cond-mat/0504731v1 Anderson, P.W., Brinkman, W.F., Huse, D.A., Thermodynamics of an incommensurate quantum crystal (2005) Science, 310, p. 1164 Andreev, A.F., Lifshitz, I.M., Quantum theory of defects in crystals (1969) Sov. Phys. 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