Physics
Scientific paper
Oct 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988phrvl..61.2121l&link_type=abstract
Physical Review Letters (ISSN 0031-9007), vol. 61, Oct. 31, 1988, p. 2121-2124. DOE-supported research.
Physics
19
Equations Of State, High Pressure, Potential Energy, Solidified Gases, Band Structure Of Solids, Electron Gas, Many Body Problem, Monte Carlo Method
Scientific paper
Comparison between pressure-volume relations in helium at high pressures indicates that theoretical calculations based on gas-phase pair potentials are not adequate to explain recent X-ray experiments. Regardless of what potential is used, the gas-phase potentials give an equation of state that is much too stiff. It is shown that if the changes in the atomic wave functions induced by the high-pressure crystal environment are taken into acocunt, then agreement between experimental and theoretical pressure volume curves is greatly improved.
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