Density modes in spherical 4He shells
We compute the density-fluctuation spectrum of spherical 4HeN shells adsorbed on the outer surface of C n fullerenes. The excitation spectrum is obtained within the random-phase approximation, with particle-hole elementary excitations and effective interaction extracted from a density-functional des...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_01631829_v69_n13_p134502_Barranco |
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todo:paper_01631829_v69_n13_p134502_Barranco2023-10-03T15:01:56Z Density modes in spherical 4He shells Barranco, M. Hernández, E.S. Mayol, R. Pi, M. carbon fullerene helium article chemical structure density density functional theory elementary particle excitation geometry hydrodynamics mathematical analysis quantum mechanics We compute the density-fluctuation spectrum of spherical 4HeN shells adsorbed on the outer surface of C n fullerenes. The excitation spectrum is obtained within the random-phase approximation, with particle-hole elementary excitations and effective interaction extracted from a density-functional description of the shell structure. The presence of one or two solid helium layers adjacent to the adsorbing fullerene is phenomenologically accounted for. We illustrate our results for a selection of numbers of adsorbed atoms on C20, C 60, and C120. The hydrodynamical model that has proven successful to describe helium excitations in the bulk and in restricted geometries permits to perform a rather exhaustive analysis of various fluid spherical systems, namely, spheres, cavities, free bubbles, and bound shells of variable size. Fil:Hernández, E.S. 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_v69_n13_p134502_Barranco |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
carbon fullerene helium article chemical structure density density functional theory elementary particle excitation geometry hydrodynamics mathematical analysis quantum mechanics |
| spellingShingle |
carbon fullerene helium article chemical structure density density functional theory elementary particle excitation geometry hydrodynamics mathematical analysis quantum mechanics Barranco, M. Hernández, E.S. Mayol, R. Pi, M. Density modes in spherical 4He shells |
| topic_facet |
carbon fullerene helium article chemical structure density density functional theory elementary particle excitation geometry hydrodynamics mathematical analysis quantum mechanics |
| description |
We compute the density-fluctuation spectrum of spherical 4HeN shells adsorbed on the outer surface of C n fullerenes. The excitation spectrum is obtained within the random-phase approximation, with particle-hole elementary excitations and effective interaction extracted from a density-functional description of the shell structure. The presence of one or two solid helium layers adjacent to the adsorbing fullerene is phenomenologically accounted for. We illustrate our results for a selection of numbers of adsorbed atoms on C20, C 60, and C120. The hydrodynamical model that has proven successful to describe helium excitations in the bulk and in restricted geometries permits to perform a rather exhaustive analysis of various fluid spherical systems, namely, spheres, cavities, free bubbles, and bound shells of variable size. |
| format |
JOUR |
| author |
Barranco, M. Hernández, E.S. Mayol, R. Pi, M. |
| author_facet |
Barranco, M. Hernández, E.S. Mayol, R. Pi, M. |
| author_sort |
Barranco, M. |
| title |
Density modes in spherical 4He shells |
| title_short |
Density modes in spherical 4He shells |
| title_full |
Density modes in spherical 4He shells |
| title_fullStr |
Density modes in spherical 4He shells |
| title_full_unstemmed |
Density modes in spherical 4He shells |
| title_sort |
density modes in spherical 4he shells |
| url |
http://hdl.handle.net/20.500.12110/paper_01631829_v69_n13_p134502_Barranco |
| work_keys_str_mv |
AT barrancom densitymodesinspherical4heshells AT hernandezes densitymodesinspherical4heshells AT mayolr densitymodesinspherical4heshells AT pim densitymodesinspherical4heshells |
| _version_ |
1807322159514648576 |