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Elastic constants of incommensurate solid 4He from diffusion Monte Carlo simulations

Author
Cazorla, C.; Lutsyshyn, Y.; Boronat, J.
Type of activity
Journal article
Journal
Physical review B: condensed matter and materials physics
Date of publication
2013-06-28
Volume
87
Number
21
First page
1
Last page
5
DOI
https://doi.org/10.1103/PhysRevB.87.214522 Open in new window
Project funding
Advanced materials and NANOtechnologies for innovative electrical, ELECTronic and magnetoelectronic devices (CSD2007-00041)
Estudio fundamental y diseño computacional de óxidos multifuncionales nanoestructurados (MAT2010-18113)
Fluidos y sólidos cuánticos fuertamente correlacionados (FIS2011-25275)
GRUP DE SIMULACIO PER ORDINADOR EN MATERIA CONDENSADA
Repository
http://hdl.handle.net/2117/20010 Open in new window
URL
http://prb.aps.org/abstract/PRB/v87/i21/e214522 Open in new window
Abstract
We study the elastic properties of incommensurate solid 4He in the limit of zero temperature. Specifically, we calculate the pressure dependence of the five elastic constants (C11, C12, C13, C33, and C44), longitudinal and transversal speeds of sound, and the T=0 Debye temperature of incommensurate and commensurate hcp 4He using the diffusion Monte Carlo method. Our results show that under compression, the commensurate crystal is globally stiffer than the incommensurate, however at pressures clo...
Citation
Cazorla, C.; Lutsyshyn, Y.; Boronat, J. Elastic constants of incommensurate solid 4He from diffusion Monte Carlo simulations. "Physical review B: condensed matter and materials physics", 28 Juny 2013, vol. 87, núm. 21, p. 1-5.
Keywords
Mètode de Montecarlo
Group of research
SIMCON - First-principles approaches to condensed matter physics: quantum effects and complexity

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