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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Autores principales:	Boninsegni, M., Szybisz, L.
Formato:	JOUR
Materias:	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
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_01631829_v70_n2_p024512_Boninsegni
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

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spelling	todo:paper_01631829_v70_n2_p024512_Boninsegni2023-10-03T15:02:01Z Structure and energetics of helium films on alkali substrates Boninsegni, M. Szybisz, L. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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 Boninsegni, M. Szybisz, L. 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.
format	JOUR
author	Boninsegni, M. Szybisz, L.
author_facet	Boninsegni, M. Szybisz, L.
author_sort	Boninsegni, M.
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
url	http://hdl.handle.net/20.500.12110/paper_01631829_v70_n2_p024512_Boninsegni
work_keys_str_mv	AT boninsegnim structureandenergeticsofheliumfilmsonalkalisubstrates AT szybiszl structureandenergeticsofheliumfilmsonalkalisubstrates
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Structure and energetics of helium films on alkali substrates

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