Carregant...
Miniatura

Tipus de document

Article

Versió

Versió publicada

Data de publicació

Tots els drets reservats

Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/10542

Density modes in spherical 4He shells

Títol de la revista

Director/Tutor

ISSN de la revista

Títol del volum

Resum

We compute the density-fluctuation spectrum of spherical 4HeN shells adsorbed on the outer surface of Cn 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, C60, 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.

Citació

Citació

BARRANCO GÓMEZ, Manuel, HERNÁNDEZ, E. susana, MAYOL SÁNCHEZ, Ricardo, PI PERICAY, Martí. Density modes in spherical 4He shells. _Physical Review B_. 2004. Vol. 69, núm. 13, pàgs. 134502-1-134502-10. [consulta: 25 de gener de 2026]. ISSN: 0163-1829. [Disponible a: https://hdl.handle.net/2445/10542]

Exportar metadades

JSON - METS

Compartir registre