Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Metastable solid He-4 and the possible role of point defects

Full text
Author(s):
Pedroso, V. Z. [1, 2] ; Zampronio, V [1, 3] ; Vitiello, S. A. [1]
Total Authors: 3
Affiliation:
[1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, UNICAMP, BR-13083859 Campinas, SP - Brazil
[2] Univ Tecnol Fed Parana, Dept Fis, Campus Ponta, BR-84016210 Ponta Grossa, Parana - Brazil
[3] Univ Fed Rio Grande do Sul, Inst Fis, UFRGS, BR-91501970 Porto Alegre, RS - Brazil
Total Affiliations: 3
Document type: Journal article
Source: JOURNAL OF PHYSICS-CONDENSED MATTER; v. 33, n. 7 FEB 17 2021.
Web of Science Citations: 0
Abstract

The metastable phase of solid He-4 and the possible role of point defects in its destabilization are investigated by the introduction of a trial function of the shadow class with an explicit symmetrical kernel. This is a trial function that ensures the possible exchange of atoms and the delocalization of atoms and defects in a very effective manner. We show that the formation energy for vacancies is equal to zero at a pressure P-c = 20 +/- 2 atm, which is in excellent agreement with the experimental observation. The pressure at which a self-interstitial also has a formation energy equal to zero, is in agreement with the density where vacancies have the same property. Formation energies of a He-3 interstitial or a substitutional impurity were estimated. Other properties of interest for systems made from He-4 atoms are estimated and compared with results from the literature whenever available. (AU)

FAPESP's process: 16/17612-7 - Dynamics of many-body systems IV
Grantee:Arnaldo Gammal
Support Opportunities: Research Projects - Thematic Grants