Abstract
We present a combined path integral molecular dynamics density functional study of high density hydrogen at T=50 K and r s =1.5 (corresponding to a pressure of about 1.5 Mbar). The effects of the proton quantum character are included beyond the usual harmonic approximations in a finite-temperature ab initio calculation. The ground state structure in the corresponding classical system remains stable but is significantly broadened by quantum dispersion effects. Simple quasiclassical models are shown to fail in the description of these dispersion effects due to strong correlations between the protons.
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REFERENCES
H. -k. Mao and R. J. Hemley, Rev. Mod. Phys. 66, 671 (1994).
L. Cui, N. H. Chen, and I. F. Silvera, Phys. Rev. Lett. 74, 4011 (1995).
P. Loubeyre et al., Nature 383, 702 (1996).
N. Ashcroft, Phys. World 8, 43 (1995).
E. G. Brovman et al, Sov. Phys. JETP 34, 1300 (1972);ibid. 35, 783 (1972).
E. Kaxiras, J. Broughton, and R. J. Hemley, Phys. Rev. Lett. 67, 1138 (1991).
H. Nagara and T. Nakamura, Phys. Rev. Lett. 68, 2468 (1992).
M. P. Surh, T. W. Barbee III, and C. Mailhiot, Phys. Rev. Lett. 70, 4090 (1993).
D. Hohl et al, Phys. Rev. Lett. 71, 541 (1993).
B. Edwards, N. W. Ashcroft, and T. Lenosky, Europhys. Lett. 34, 519 (1996).
J. Kohanoff et al., Phys. Rev. Lett. 78, 2783 (1997).
O. Pfaffenzeller and D. Hohl, J. Phys. :Condens. Matter (in press); O. Pfaffen-zeller, Ph. D. thesis, Forschungszentrum Julich (Julich 1996).
D. M. Ceperley and B. J. Alder, Phys. Rev. B 36, 2092 (1987).
V. Natoli et al., Phys. Rev. Lett. 70, 1952 (1993);ibid. 74, 1601 (1995).
D. Marx and M. Parrinello, Z. Phys. B 95, 143 (1994); Nature 375, 216 (1995); J. Chem. Phys. 104, 4077 (1996); Science 271, 179 (1996).
R. Car and M. Parrinello, Phys. Rev. Lett. 55, 2471 (1985).
D. M. Ceperley, Rev. Mod. Phys. 67, 279 (1995).
C. Pierleoni et al., Phys. Rev. Lett. 73, 2145 (1994).
R. O. Jones and O. Gunnarsson, Rev. Mod. Phys. 61, 689 (1989).
S. Vosko, L. Wilk, and M. Nusair, Can. J. Phys. 58, 1200 (1980).
M. E. Tuckerman et al., J. Chem. Phys. 104, 5579 (1996).
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Biermann, S., Hohl, D. & Marx, D. Proton Quantum Effects in High Pressure Hydrogen. Journal of Low Temperature Physics 110, 97–102 (1998). https://doi.org/10.1023/A:1022566818119
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DOI: https://doi.org/10.1023/A:1022566818119