dc.contributor.author | Hansen, Flemming Y. | eng |
dc.contributor.author | Frank, V. L. P. | eng |
dc.contributor.author | Taub, Haskell | eng |
dc.contributor.author | Bruch, L. W. | eng |
dc.contributor.author | Lauter, H. J. | eng |
dc.contributor.author | Dennison, J. R. | eng |
dc.date.issued | 1990 | eng |
dc.description | URL:http://link.aps.org/doi/10.1103/PhysRevLett.64.764
DOI:10.1103/PhysRevLett.64.764 | eng |
dc.description.abstract | Inelastic neutron spectra of the commensurate √3 ×3 herringbone monolayer phase of nitrogen physisorbed on the graphite (002) surface at low temperature have been compared with lattice dynamics calculations of the polycrystalline-averaged one-phonon coherent neutron cross section. The observed zone-center energy gap of ∼0.4 THz in the acoustic-phonon branches is a factor of 2 larger than calculated from central atom-atom potentials. We conclude that current models of the corrugation in the adatom substrate potential greatly underestimate the lateral restoring forces in this relatively simple molecular film. | eng |
dc.description.sponsorship | This work was partially supported by the West German Federal Ministry of Research and Technology (V.L.P.F.), NSF Grants No. DMR-8704938 (H.T.) and No. DMR-8817761 (L.W.B.) and the Danish Natural Science Research Council Grant No. M 11-7015 (F.Y.H.) | eng |
dc.identifier.citation | Phys. Rev. Lett. 64, 764-767 (1990) | eng |
dc.identifier.issn | 0031-9007 | eng |
dc.identifier.uri | http://hdl.handle.net/10355/8799 | eng |
dc.language | English | eng |
dc.publisher | American Physical Society | eng |
dc.relation.ispartofcollection | University of Missouri--Columbia. College of Arts and Sciences. Department of Physics and Astronomy. Physics and Astronomy publications | eng |
dc.subject | surface and interface dynamics and vibrations | eng |
dc.subject | phonon states and bands | eng |
dc.subject | normal modes | eng |
dc.subject | phonon dispersion | eng |
dc.subject.lcsh | Electron-phonon interactions | eng |
dc.title | Corrugation in the nitrogen-graphite potential probed by inelastic neutron scattering | eng |
dc.type | Article | eng |