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

Author
Cazorla, C.; Boronat, J.
Type of activity
Journal article
Journal
Journal of low temperature physics
Date of publication
2015-07-01
Volume
180
Number
1-2
First page
20
Last page
28
DOI
https://doi.org/10.1007/s10909-014-1238-x Open in new window
Project funding
Fluidos y sólidos cuánticos fuertemente correlacionados
Repository
http://hdl.handle.net/2117/28560 Open in new window
URL
http://link.springer.com/article/10.1007%2Fs10909-014-1238-x Open in new window
Abstract
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...
Citation
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.
Keywords
Algorithms, Bubbles, Elasticity, Liquid-helium, Metastable, Negative-pressure, Nucleation, Solid helium, Thermodynamic properties
Group of research
SIMCON - First-principles approaches to condensed matter physics: quantum effects and complexity

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