Neutron-Scattering Study Of Structure Of Adsorbed Helium Monolayers And Of Excitation Spectrum Of Few-Atomic-Layer Superfluid Films

Kim da Costa Carneiro, W. D. Ellenson, L. Passell, J. P. Mctague, H. Taub

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Elastic diffraction of neutrons from helium adsorbed on Grafoil shows that the surface monolayer forms as a highly compressed, ordered triangular lattice incommensurate with the structure of the underlying graphite basal planes. Inelastic scattering from thin superfluid films on top of the surface monolayers reveals the existence of bulklike rotons in films containing on average as few as three layers of atoms.
Original languageEnglish
JournalPhysical Review Letters
Volume37
Issue number25
Pages (from-to)1695-1698
ISSN0031-9007
Publication statusPublished - 1976
Externally publishedYes

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