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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Autor principal: Szybisz, Leszek
Publicado: 2004
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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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spelling 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
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