Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/92794
Type: Artigo de periódico
Title: Zero-point Divacancy Concentration In The Shadow Wave Function Model For Solid 4he
Author: Pessoa R.
De Koning M.
Vitiello S.A.
Abstract: We address the issue of interaction between zero-point vacancies in solid H4 e as described within the shadow wave function model. Applying the reversible-work method and taking into account finite-size effects, we obtain a zero-point monovacancy concentration of (2.03±0.02) × 10-3, which is slightly higher than the result due to Reatto for the same model. Utilizing the same methodology, we then consider the divacancy, taking into account both the in-plane as well as out-of-plane configurations with respect to the basal plane. We find no significant anisotropy between both conformations. Furthermore, although there is a small binding tendency, the expected divacancy concentration is only ∼4-5 times larger than the value expected in the absence of any clustering propensity, 2.5× 10-5. This result suggests that, within the employed model description, no vacancy aggregation leading to phase separation is to be expected in the ground state. © 2009 The American Physical Society.
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Rights: aberto
Identifier DOI: 10.1103/PhysRevB.80.172302
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-72849139341&partnerID=40&md5=51f52d3af6966f481d093d410bdab00b
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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