Metastable solid4He and the possible role of point defects.
J Phys Condens Matter
; 2020 Oct 29.
Article
em En
| MEDLINE
| ID: mdl-33120373
The metastable phase of solid4He 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 Pc=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 a3He interstitial or a substitutional impurity were estimated. Other properties of interest for systems made from4He atoms are estimated and compared with results from the literature whenever available.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
J Phys Condens Matter
Assunto da revista:
BIOFISICA
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Reino Unido