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|Type:||Artigo de periódico|
|Title:||Elastic Anomalies of Crystalline He-4 at T=0|
de Koning, M
|Abstract:||Elastic constants for hcp He-4 are investigated at zero temperature, from close to the melting pressure up to 14 MPa approximately. Well known relations of these quantities are used to analyze the results. A reliable model wave function is used in the calculations. We show that the linear compressibility has a non-isotropic character in a range of densities rather than the expected isotropic behavior. A fact that suggests that the relation among elastic constants that depends on a constant value of the structure parameters ratio c/a for hcp quantum crystals should not be used to extract an elastic constant from experimental data.|
Elastic constants relations
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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