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The Limit of mechanical stability in quantum crystals: a diffusion Monte Carlo study of solid He-4

Autor
Cazorla, C.; Boronat, J.
Tipus d'activitat
Article en revista
Revista
Journal of low temperature physics
Data de publicació
2015-07-01
Volum
180
Número
1-2
Pàgina inicial
20
Pàgina final
28
DOI
https://doi.org/10.1007/s10909-014-1238-x Obrir en finestra nova
Projecte finançador
Fluidos y sólidos cuánticos fuertemente correlacionados
Repositori
http://hdl.handle.net/2117/28560 Obrir en finestra nova
URL
http://link.springer.com/article/10.1007%2Fs10909-014-1238-x Obrir en finestra nova
Resum
We present a first-principles study of the energy and elastic properties of solid helium at pressures below the range in which it is energetically stable. We find that the limit of mechanical stability in hcp He is bar, which lies significantly below the spinodal pressure found in the liquid phase (i.e., bar). Furthermore, we show that the pressure variation of the transverse and longitudinal sound velocities close to does not follow a power law of the form , in contrast to what is observed in t...
Citació
Cazorla, C.; Boronat, J. The limit of mechanical stability in quantum crystals: a diffusion Monte Carlo study of solid He-4. "Journal of low temperature physics", 01 Juliol 2015, vol. 180, núm. 1-2, p. 20-28.
Paraules clau
Algorithms, Bubbles, Elasticity, Liquid-helium, Metastable, Negative-pressure, Nucleation, Solid helium, Thermodynamic properties
Grup de recerca
SIMCON - First-principles approaches to condensed matter physics: quantum effects and complexity

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