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Spin-polarized hydrogen adsorbed on the surface of superfluid 4He (CROSBI ID 192513)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Marin, Jordi ; Vranješ Markić, Leandra ; Boronat, Jordi Spin-polarized hydrogen adsorbed on the surface of superfluid 4He // The Journal of chemical physics, 139 (2014), 22; 224708, 6. doi: 10.1063/1.4843375

Podaci o odgovornosti

Marin, Jordi ; Vranješ Markić, Leandra ; Boronat, Jordi

engleski

Spin-polarized hydrogen adsorbed on the surface of superfluid 4He

The experimental realization of a thin layer of spin-polarized hydrogen H↓ adsorbed on top of the surface of superfluid 4He provides one of the best examples of a stable, nearly two-dimensional (2D) quantum Bose gas. We report a theoretical study of this system using quantum Monte Carlo methods in the limit of zero temperature. Using the full Hamiltonian of the system, composed of a superfluid 4He slab and the adsorbed H↓ layer, we calculate the main properties of its ground state using accurate models for the pair interatomic potentials. Comparing the results for the layer with the ones obtained for a strictly 2D setup, we analyze the departure from the 2D character when the density increases. Only when the coverage is rather small the use of a purely 2D model is justified. The condensate fraction of the layer is significantly larger than in 2D at the same surface density, being as large as 60% at the largest coverage studied.

helium ; hydrogen ; adorption ; quantum Monte Carlo ; Berezinski-Kosterlitz-Thouless transition ; gas

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Podaci o izdanju

139 (22)

2014.

224708

6

objavljeno

0021-9606

1089-7690

10.1063/1.4843375

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Fizika

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