Structure and energetics of helium films on alkali substrates
Low-temperature adsorption of 4He films on Alkali metal substrates is investigated theoretically by means of ground-state quantum Monte Carlo simulations. The most accurate potentials currently available are utilized to model the interaction of 4He atoms with the substrate. Continuous growth of film...
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Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01631829_v70_n2_p024512_Boninsegni http://hdl.handle.net/20.500.12110/paper_01631829_v70_n2_p024512_Boninsegni |
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paper:paper_01631829_v70_n2_p024512_Boninsegni2023-06-08T15:14:04Z Structure and energetics of helium films on alkali substrates Szybisz, Leszek alkali helium lithium potassium rubidium sodium accuracy article calculation chemical structure density energy film low temperature procedures mathematical analysis Monte Carlo method quantum mechanics theory Low-temperature adsorption of 4He films on Alkali metal substrates is investigated theoretically by means of ground-state quantum Monte Carlo simulations. The most accurate potentials currently available are utilized to model the interaction of 4He atoms with the substrate. Continuous growth of film thickness as a function of chemical potential is observed on Li, Na, and K substrates. A superfluid monolayer forms on a Li substrate; on Na and K, thermodynamically stable films are a few layers thick. The uncertainties of the calculation and in the potentials, preclude a definitive conclusion on the existence of a stable 4He film on Rb. A comparison of the results of this calculation with those obtained using the Orsay-Trento density functional shows broad quantitative agreement. Fil:Szybisz, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2004 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01631829_v70_n2_p024512_Boninsegni http://hdl.handle.net/20.500.12110/paper_01631829_v70_n2_p024512_Boninsegni |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
alkali helium lithium potassium rubidium sodium accuracy article calculation chemical structure density energy film low temperature procedures mathematical analysis Monte Carlo method quantum mechanics theory |
spellingShingle |
alkali helium lithium potassium rubidium sodium accuracy article calculation chemical structure density energy film low temperature procedures mathematical analysis Monte Carlo method quantum mechanics theory Szybisz, Leszek Structure and energetics of helium films on alkali substrates |
topic_facet |
alkali helium lithium potassium rubidium sodium accuracy article calculation chemical structure density energy film low temperature procedures mathematical analysis Monte Carlo method quantum mechanics theory |
description |
Low-temperature adsorption of 4He films on Alkali metal substrates is investigated theoretically by means of ground-state quantum Monte Carlo simulations. The most accurate potentials currently available are utilized to model the interaction of 4He atoms with the substrate. Continuous growth of film thickness as a function of chemical potential is observed on Li, Na, and K substrates. A superfluid monolayer forms on a Li substrate; on Na and K, thermodynamically stable films are a few layers thick. The uncertainties of the calculation and in the potentials, preclude a definitive conclusion on the existence of a stable 4He film on Rb. A comparison of the results of this calculation with those obtained using the Orsay-Trento density functional shows broad quantitative agreement. |
author |
Szybisz, Leszek |
author_facet |
Szybisz, Leszek |
author_sort |
Szybisz, Leszek |
title |
Structure and energetics of helium films on alkali substrates |
title_short |
Structure and energetics of helium films on alkali substrates |
title_full |
Structure and energetics of helium films on alkali substrates |
title_fullStr |
Structure and energetics of helium films on alkali substrates |
title_full_unstemmed |
Structure and energetics of helium films on alkali substrates |
title_sort |
structure and energetics of helium films on alkali substrates |
publishDate |
2004 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01631829_v70_n2_p024512_Boninsegni http://hdl.handle.net/20.500.12110/paper_01631829_v70_n2_p024512_Boninsegni |
work_keys_str_mv |
AT szybiszleszek structureandenergeticsofheliumfilmsonalkalisubstrates |
_version_ |
1768541839703408640 |